I'm willing to bet that our captive creatures have a lot of behaviors we haven't witnessed.

I just happened to have the honor of owning a pink and green toxic frisbee that can launch of its' own free will.

He has returned to his normal size and location. I'm not totally sure what sets him off, he only does this hovercraft imitation once every few months (that I see, any way). My helmet coral gets overinflated sometimes, but he never manages liftoff. Thank goodness. A tea saucer, with tentacles. Do Not Need.