When I was talking to YouTube video creator Freddie Wong, who heads the channel RocketJump, he told me that today — far more often than signatures — fans want selfies.

So, these stars are coming up with efficient ways to take a bunch of them in a short amount of time. 

Apparently at some of these conventions, fans form big circles, with their phones out, and the stars runs around the back of the circle putting their head in shot after shot.

Whatever you think of selfies, you’ve got to admire the ingenuity.