Brock Lesnar's coach Erik Paulson is a renowned and respected grappler with a BJJ, Sambo, and Shooto background (to name a few).
Here's some catch wrestling subs that look rather painful.
https://www.youtube.com/watch?v=Y_B7Wd4LF28
Here's some catch wrestling subs that look rather painful.
https://www.youtube.com/watch?v=Y_B7Wd4LF28