Tuesday night DCA/MIA young male FA swam against the swells going to coach to get PBDs. Excellent service in the air. Unfortunately for him and the other FAs the guy sitting next to me kept giving the FAs a hard time (seated in row 1) about the amount of time to get to the runway for take off and the time in flight. I guess he wanted what? For the FAs to pound on the cockpit door and scream hurry it up?