Of course. I wouldn't be rude, as next time he might have money. I gave a talk to some students recently, and one of the main messages I gave was "work hard and be nice to people", cause no-one will hire you if you're a dick. I might upload a few to picfair and link and see if he bites.
Sounds like he is used to being told where to go. He was polite to you, be polite to him.