Perhaps the real question should be what kind of cap is it?

How exactly does one throw a cap around their shoulders?
Use some sort of hula hoop contraption?
Wear something similar to a Skip-It around their neck with a cap attached to the end?
Get caught in the center of a tornado?
Magic?
String?
Be in front of a green screen with a bunch of green people tossing it around?
Develop some sort of a gravitational field/orbit?
Wear a second hat that's connected to the first so that when you walk it swings around the body?
Drone technology?
A malfunctioning boomerang?
Carrier pigeon?
Hummingbird?
Forget to type the letter e?

(I just don't know, but I'm positive it's not the last one.)