[theblackbox]

There is a really annoying one that used to haunt me when being forced to enjoy watching football (soccer) with my dad: ALL video replays had the exact same audio on it. It really used to grate on me as it was really obvious once you had got used to it, but my dad could never hear it.

Just a little anecdotal evidence of my experience on this fascinating subject. Perception, attention and information are very interesting facets of psychology!