Boards
Playing Tetris can help reduce traumatic flashbacks
This was on Today this morning.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2607539/
Essentially they reckon that in the first 6 hours after a trauma your memories are still forming and can be disrupted by the right impulses. Tetris, with its colours and brain/control work apparently does just that and so dulls the chances of messy flashbacks. If only they'd had that for soldiers in the 'Nam, eh?