Amazing. If they been nearby ever…

Cell phone jammer
A cell phone jammer is an instrument used to prevent cellular phones from receiving and transmitting the mobile signals to a base station. When used, the jammer effectively disables cellular phones in the area. These devices can be used in practically any location, but are found primarily in locales where a phone call would be particularly disruptive. These include places of worship (churches, mosques, etc.), libraries, movie theaters, meeting rooms, and other places where silence is expected.
History
The rapid proliferation of cell phones in recent years to near ubiquitous status eventually raised problems such as their potential use to invade privacy, contribute to academic cheating, or even aid in corporate espionage. In addition public backlash was growing against the perceived disruption cell phones introduced in daily life. While older analog cell phones often suffered from chronically poor reception and could even be disconnected by simple interference such as high frequency noise, increasingly sophisticated digital phones have led to more elaborate counters. Cell phone jamming devices are an alternative to more expensive measures against cell phones, such as Faraday cages, which are mostly suitable as built in protection for structures. They were originally developed for law enforcement and the military to interrupt communications by criminals and terrorists. Some were also designed to foil the use of certain remotely detonated explosives. The civilian applications were apparent, so over time many companies originally contracted to design jammers for government use switched over to sell these devices to private entities. Since then, there as been a slow but steady increase in their purchase and use especially in major metropolitan areas.
Operation
Jammers block cell phone use by sending out radio waves along the same frequencies that cellular phones use. This causes enough interference with the communication of cell phones and the towers to render the phones unusable. On most retail phones, the network would simply appear out of range. Most cell phones use different bands to send and receive communications from towers. Thus jammers can work by either disrupting phone to tower frequencies or tower to phone frequencies. Smaller handheld models block all bands from 800MHz to 1900MHz within a 30 foot range. Small devices tend to use the former method, while larger more expensive models may interfere directly with the tower. The radius of cell phone jammers can range from a dozen feet for pocket models to kilometers for more dedicated units. The TRJ-89 jammer can block cellular communications for a 5-mile (8 km) radius.
Older jammers sometimes were limited to working on phones using only analog or older digital mobile phone standards. Newer models such as the double and triple band jammers can block all widely used systems (AMPS, iDEN, GSM, et al) and are even very effective against newer phones which hop to different frequencies and systems when interfered with. As the dominant network technology and frequencies used for mobile phones vary worldwide, some work only in specific regions such as Europe or North America.
The power of the jammer’s effect can vary widely based on factors such as proximity to towers, indoor and outdoor settings, presence of buildings and landscape, even temperature and humidity play a role.
There are concerns that crudely designed jammers may disrupt the functioning of medical devices such as pacemakers. However, like cell phones, most of the devices in common use operate at low enough power output (<1W) to avoid causing any problems.
From Wikipedia, the free encyclopedia

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Hilarious, chair-breaking prank!

Now the Boss can say “Rollin On Floor L… Hmmm… Um… Shit.”

Office Chair Long Jump
Introduction
This is the event you’ve all been training for. Your chance to show off your chair sitting muscules, muscules you’ve been training since your first day at school. All you have to do is to sit down in an office chair and propell yourself forward.
The Concept
You know the long jump. You’ve seen it on TV while watching the (other) Olympics. The people run really fast down a long runway, propel themselves into the sky and land (hopefully) feet-first into a big sand pit. Well, this is the CSAIL Lab and we like to do things a bit differently here. There aren’t any sand pits in the building, but there are large flat open areas. We can’t jump very well, but we sure do get around on our office chairs. Hence, the CSAIL Lab version of the long jump is the Office Chair Long Jump.
Competitors will propel themselves down a runway using their feet or whatever other appendages or powers they possess. Before they get to the end of the runway, they will stop propelling themselves and coast to a stop. The distance of their “jump” will be their score.
The Rules
* Each competitor will be allowed two “jumps” with the longer distance counting for the final rankings.
* Each competitor must have his or her rear (both cheeks!) firmly planted in the seat of the chair during the “jump.” Not having both cheeks on the chair before crossing the line is a fault (see below). Locomotion may be provided in (more-or-less) any manner so long as this rule is observed.
* Distance is measured as the shortest distance from the line to the nearest part of the chair.
* Each competitor is allowed a single “fault.” Two faults ends a competitor’s turn with no further scores for that competitor being allowed. Faults include: touching the ground once the chair has passed the line, tipping over the chair on the runway, or hitting a wall on the runway.
* The chairs will be selected by the commissioner, and will hopefully be of the same five-legged variety we’ve used in the past few years.
* Helmets are optional.
* In the event of broken chairs, bad timing, reckless behavior, or natural disasters caused, the judgment of the commissioner will prevail.
Scoring
Each competitor will receive a score equal to the distance of his/her best “jump.” Each team will be given a score equal to the sum of all the scores received by team members. Upper and lower bounds will be placed on individual competitor scores in order to encourage participation (for example, 1 foot=10 points, 2247 feet=30 points). Hence, a team can rack up a large score simply by having many team members participate.

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This one will always make me laugh

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