British bobsled rider Gillian Cooke splitting her pants at the World Championships in Switzerland.
Just before shoving off, Cooke is vigorously thrusting back and forth when her skin-tight suit erupts open right down the middle of her backside. She doesn't seem to notice, and she takes off with teammate Nicola Minichiello.
The duo was able to pilot their sleigh to a seventh-place finish.
Here's a few freeze frames, and a gif. The full vid is easy to find (youtube etc.) and worth a look ...