I made one of those today. With even a FWEEP! slide whistle sound effect as my leg swung out from under me on the ice. Unfortunately I did not hover in mid-air a second or so before the fall, nor was I able to stay in air indefinitely until I could look down and realize I was defying gravity and cause the levitation to fail. I did, however, fall straight down and rocked back onto my backpack, which was nice at least. But my right hand is slightly cut up from landing on the non-slick part of the ice in an attempt to stabilize myself and my right ankle was twisted in a way God didn't mean for it to twist in the first place, so now it is incessantly complaining about the completely unfair treatment it has received and loudly at that. There is no position that the ankle won't complain about. Lousy stinkin ankle. Ain't I been kind to you?
I think the thigh is also sympathizing with the ankle's plight and stretching oddly. But that's winter weather for you here.
I just like the part about making cartoon sound effects.