Good Bad Bugs/New Media

New Media

 * In the Google Earth flight simulator, if you hit the ground, you die. However, if you start on the ground, don't take off and be very careful with the controls, the game doesn't register you hitting the ground as dying. Because of this, you can, among other things, taxi a propeller plane through/out of/into the Grand Canyon/Mount Everest and taxi a F16 on/under water.
 * deviantART had a bug that if you checked a message as soon as you received it, the time would sometimes say, "In the future."
 * Sounds more like The Dev Team Thinks of Everything to me...
 * The explanation may be more mundane. A lot of web frameworks have reusable functions to convert dates into human-readable relative descriptions, such as "5 minutes ago" or "1 day ago". They're written to be usable for any date in the past or the future; so, for example, you could have reminders for "2 days in the future."
 * YouTube has a bug where if you put a 0.1 second pause at the end of a video, it will sometimes loop back to the start. This has led to some interesting results.
 * Speaking of YouTube, the official iPhone and Android apps for the site both have exploits that allow you to view 18+ videos without an account.
 * Some forums have bugs where a person's post can be shunted a few minutes (or even hours) back or forwards in time and end up appearing in the wrong place. While this can be amusing enough as it is it is even better when it's a forum about a time travel game.

Tabletop Games

 * In Magic: The Gathering, the stack operates in a "Last In, First Out" manner. This means that the last ability put into the stack, played in response to something, occurs first. This can be exploited whenever something has a "leaves play" effect and some other effect. Often, these "leaves play" effects undo the previous effect, but if you somehow remove the card from play in response to its other effect, the card will leave play without undoing anything, and then the initial effect activates and never gets undone. This can remove lands, creatures, cards from a player's hand, and life permanently. If you remove the exploitable card from play by returning it to your hand, you can even repeat the effect!

Toys

 * Certain more recent Tamagotchi models have a trick with a pencil and a screwdriver that lets you access the device's debug menu, which allows you to choose any pet you want, including those that were Dummied Out.

Video Games

 * There was an online Martian Rover Sim in 3D, which had been designed as part of the mission's publicity. The Sim was designed to show how the rover would move and collect samples. It also had some speed settings which, instead of speeding up the whole animation, increased the speed of the rover, allowing some really stupid stunts. You could take the rover to the edge of the map, where there was a small wall, climb it, and head out into the wide red yonder, which caused the rover to drive upside down through the air, among other things... Not bad for an educational resource!
 * Family Feud on the SNES was very buggy in terms of what it would accept as the correct answer. The game usually just checks if the first few letters of your answer matches any answer on the board or if they're in the same order regardless of what other letters are between them, so sometimes entering gibberish, swear words, or just about anything else could match something on the board even if your typed response is way off the mark. Milked for all it's worth in this TAS.
 * In Grand Theft Auto, pressing the horn button while on foot would make the player character fart and belch. This action can still be done if the player is killed.
 * Nearly forgotten on this date, but the original Combat for the Atari 2600 allowed you to drive your tank into a corner while exactly in line with one of the walls, which would teleport your tank to the opposite side of the screen.

Real Life - Software

 * Microsoft Sam has a very interesting way of saying "soi" and "soy". This sound has come to be referred to by some as the ROFLcopter.
 * The still-alpha Windows-clone ReactOS got a bug in its hard disk driver that caused it not to register and prevent access to disks - or it would have, had the Plug-n-Play infrastructure not been so screwed up that it set everything up anyway.