Does this happen to anyone else when playing graphically demanding games?

view story

http://androidforums.com – this happens to my screen when i play any graphically demanding game. It doesnt happen constantly but it seems the longer i play the game the more prone this is to happen. The picture shows Temple Run but It also happens when i play Riptide and DeadTrigger. I have no idea what is causing it and ive tried everything that i know to do. My first thought was that maybe it was because my heap size was too low because i normally keep it waaaaayyyyy below the stock 256...but i moved it back up and it still happens. Any ideas? (General)