In inline skating, the move one ends up making with their arms if one doesn't properly bend his or her knees. This ultimately futile attempt to regain balance inevitably results in the perpetrator landing on his or her rear.
When I was rollerblading the other day, I hit a piece of gravel that sent my balance off. I started doing the windmill of death and ended up falling on my butt.
this is taking headbanging to the next level, going so fast that other people will stand close to you to get cooled off by the fan of air coming off your moving-at-warp-9 hair
i was doing the windmill of death under a strobe light and people used me as a fan