"Ride on the sidewalk!" -- There are signs all over saying that bikes arent allowed on the sidewalks. Im not sure how people miss these.
"Nice ass!" -- Has happened twice. One time it was my roommate though :/
"Get a f*ckin car!" -- I think this one is funny because the bike I was riding was probably worth more than the car that it came from.
"Hey! Dont fall over!" -- While trackstanding. I guess this was pretty good advice.