A fixie for a tall bike makes sense because one can (presumably?) track stand to keep the bike upright while stopped. Otherwise you gotta hope there's a stop sign you can lean up against or just never stop...
Well, his technique of having a crowd of cops and fellow riders to block traffic for you seems to work for getting around without having to stop. Maybe not practical for everyday riding, though...
Usually what you do is keep moving and either turn right with traffic or circle around. You can also grab onto something but if you're on the street there isn't really anything within reach. A track stand is hard to pull off for very long for even experienced riders on normal fixies.
