The human body is capable of some weird things.
WWE RAW women's champion Alexa Bliss is hypermobile (aka double-jointed) in her elbows, and she used that mobility to pull off this trick during her title match against Sasha Banks.
If you are unaware that she's double-jointed, that looks very frightening after first look. I mean, look at it.
It made for a really good spot though, as Bliss use the fake injury to hit what look like a stiff forearm. Bliss eventually retained her title thanks to a countout, but Banks got the last laugh by attacking Bliss after the match.