A lot of Halloween pranks feature something popping up unexpectedly to startle the victim, but this takes it a level further.
Phoenix Suns guard Eric Bledsoe literally ran the other way when a full-size "baby" Tyrannosaurus rex emerged from behind a curtain, roared and chased him.
Of course, it wasn't really a dinosaur. It was a performer from the live rendition of the award-winning BBC series Walking with Dinosaurs.
His teammates may give him a hard time for this one, but most of them didn't react too differently: