Michael Douglas: very low-key, nice and unassuming. Bumped into him while he was buying yoghurt in a supermarket with his son. Pleasant and chatty.
not being funny but don't you mean you accosted him in a conversation? by "bumping into him" suggests that you both casually got chatting, which I very much doubt is the case. are you saying he instigated it?
and people wonder why celebs get ratty sometimes.