He was just acting
He's not an actor and this was a documentary, so I don't have to tell you what it was. Naughty Mark!
He was pretending
Don't acting and pretending mean the same?
If acting is what an actor does, and he's not an actor, but he's doing a documentary, then he is pretending in the documentary
That clears things up then.
I mean... he knew about the lyrics in the floor, but maybe he thought it would be nicer for the interview with Brian to pretend he didn´t and that was surprised about it...
Actually, MK does that all the time in many interviews. I recall listening to different explanations about songs like "Cannibals" or "Coyote", and I even recall MK saying "I might had said that I was watching the coyote cartoons with my kids, but I wasn't, it was just the idea of pursuing what you want etc etc etc etc", so he kind of recognized he was lying about the inspiration of the song, LOL