you might know the famous video @ http://www.youtube.c.../watch?v=vJG698U2Mvo
(students passing a ball; if not, watch it!), I'm searching for the video where some fictional crime scene in a living room is shown, and things change while the camera shows other areas of the room - and you don't notice it (or only a few things).
I loved it (I think it was actually a commercial from the UK, about noticing kids or people on bikes in traffic... has been a while), but can't find it anymore... who could point me to it?
(PS: It wasn't as bloody as the ones like http://www.youtube.c.../watch?v=a44AnA6_-2o