He tries to make lunch for his wife, but she's rushing out early. He races after her on his bicycle, and gets recognised and questioned by the cops.
A member of his former gang recognizes him and asks why he left. He takes him along to cooking class.
Former rivals follow him to a store. He presses them into bargain hunting.
He tries to get the perfect present for his wife's birthday.
In each of these, the humor comes from him treating an ordinary occurrence with deadpan seriousness.