In the movie "We're Back! A Dinosaurs' Story", the same idea is used to disappear Professor Screweyes.

He stands on the stage in the circus and is covered by crows. When the crows fly away only his screweye is left.

It's a little bit scary for the target audience (children under 12-- it is G rated). At least my kids were freaked out when they first saw it.

Maybe Larson should go after Spielberg and Universal?