That was the funniest part- the dude wasn't big. He looked relatively fit, he had some biceps, but his quads were ridiculously small and his traps were fairly nonexistent. He looked like a curl jockey, and he was at least fifty five years old.
I'm certainly not "huge", but I've had quite a bit of beginner's gain (is that the term for fast gains when first starting out?)- about thirty five pounds of lean body mass in five or six months. I was easily bigger than this guy.
However, I don't like to get in an argument at the gym unless it's absolutely necessary. If it lead to violence, I suspect I'd have my membership revoked- I'm sixteen, and it'd probably be assumed that I was the instigator, heh.