Touching gesture from Chris Jericho ... the AEW superstar donated $2,000 to a man who snapped both his legs performing a stunt in the wrestling ring.
The violent and gruesome injury happened this past weekend ... when amateur wrestler Justin attempted to jump off the top rope of a makeshift backyard ring and onto the mat.
**WARNING -- THIS VIDEO IS VERY DISTURBING AND YOU CAN'T UNSEE IT. PLEASE, REALLY THINK ABOUT IT BEFORE YOU WATCH. **
Shockingly, both his knees gave way and bent backward when he landed .