In X-Men: First Class, Banshee uses ultrasonic screaming like a jet pack to power his flight. In a recent video from special effects whiz Freddie Wong, a character named "Milk Man" gushes gallons of milk from his gullet to achieve a similar effect.

This, of course, got MinutePhysics' Henry Reich thinking: how much milk would Milk Man really need to spew in order to keep himself aloft? Basic rocket science ensues.

[Via minutephysics]