Marcus hears everything, but he has an extremely active filtering system. You know when you read or hear something and, without being moved to actually formulate a comment on it, you make a "heh" noise? Or sometimes "pfuh". Marcus, from the other side of the room, will give you a forensic look and demand "Why did you say "pfuh"? Then you have to make a long-winded explanation to him of what you thought was not-quite-actually remarkable.
But does he take it in when you tell him its TV, not a video, so we can't watch it again? No.
Big cheerios to Philip in Perth who actually left me a comment! Give it a go the rest of you, it doesnt hurt. If he can send me a comment all the way across the burning sands I think some of you could dig deep too.