BOO at the receptionist
This film was hilarious. There is just about nothing Keanu can do that isn't funny. Smoking. Gambling. Eating pizza. Funerals. The "you love me don't you" speech to the teacher. The rendition of "big poppa"... the list goes on.
But WHAT was that thing he did to the receptionist in the bank? He went to get his money or whatever, but then just before he left he made a kind of "BOO" gesture at her then walked out. Perhaps Keanu is adding subtle depth to the character?