This weekend at Comic-Con International in San Diego, Doctor Who star Matt Smith finally got to do something he was unable to do during his previous appearances: wander the exhibition floor. And to pull it off without being besieged by countless fans, the actor did what any international sci-fi star would do. He donned a Bart Simpson mask.

In the BBC America video below, the masked Smith takes to the floor, trailed by camera operators and security, attempting to engage attendees wearing Doctor Who gear while doing his best American accent. The results of both efforts are decidedly mixed.

"No one wanted to talk," an exasperated Smith says. "Everybody's like, 'Who's the weird guy talking to me as Bart Simpson?'"