Researches at the Oxford University in England have discovered that the effects of traumatic stress can be dampened by something as simple as playing a bit of Tetris.
40 healthy volunteers were exposed to a film containing a series of traumatic graphic images of injuries. Half of the subjects were given the game Tetris to play after the film, while the remaining 20 were simply sent on their merry, traumatized ways. The team then recorded data on flashbacks over the course of the following week, and found that the participants who did not play Tetris experienced a normal number of violent flashbacks, while those that did were terrorized by nightmares of being sodomized by L-shaped blocks.
No! Those that played the game experienced less flashbacks than those that did, conclusively proving...well, nothing really, but boy do those researchers have fun
http://kotaku.com/5125352/tetris-spells-trauma-relief