A woman in Russia stripped down to her bra and thong to do a polar plunge into a lake. She got a running start and attempted a cannonball, but didn't know the lake had frozen over so she just bounced and then slid on the ice.
The guy who was filming it had no sympathy. Just laughter.
She ended up breaking her ankle, but he didn't know it at the time since she was able to stand on it to limp back.
(Search for "Icy Lake Jump Fail.")