Portal Gun and Magnetic Levitation

Rhett doesn’t quite get to the point where he explains what’s going on in the video, since the levitation mechanism for the system is only hinted at, but they talk of the coil, so it’s almost certainly a servo-mechanism adjusting the coil current, as Rhett guesses.

Watching this, I was thinking that it would be nest to take one of those globes and cover it with a pattern to make it look like a Beryllium Sphere from Galaxy Quest. Never give up! Never surrender!