Yes, it's perfectly legal.
Illegal in amateur MMA though, for example.
I believe most BJJ/submission wrestling competitiosn generally ban this along with knee locks until competitors are at certain level (purple belt?), as well?
"I hadn't known there were so many idiots in the world until I started using the Internet."
Cogito ergo bum.
Last edited by Karelinator; 02-19-2014 at 06:37 AM.