Seen a chick running hard on a treadmill, and her hand snagged the cord tied to the magnetic emergency stop device. Treadmill stopped dead, and she did a floppy chicken onto the control panel. It was funny as hell, and she was pretty shaken up. It was around 5am, and we were the only 2 in the place. The gym is pretty small with wall to wall mirrors, so it was pretty hard to miss, but I pretended I didn't see it 'cause I didn't want to put her through the embarrassment