There was this wrestling event between Russia and Britain. Before the match, the British wrestler's trainer gave him some advise. He said, "We have done a lot of research on the Russian and it is found that he is an expert with the 'pretzel' grip. Once he gets his grip, it is nearly impossible to beat him. Just don't let him get you in that grip. If he does, you are a goner."
The British wrestler acknowledged his understanding. The match commenced. Now, to the match: The Briton and the Russian went around in circles, both looking for an opening. All of a sudden the Russian pounced, capturing the Briton the dreaded pretzel grip!
A crowd went silent, and the trainer shut his eyes for he knew all was lost. He couldn't bear to watch the proceedings.
Suddenly there was a blood curdling scream, and a resounding cheer from the spectators. The trainer opened his eye just in time to see the Russian jumping up in the air. The Russian hit the floor with a thud, and the Briton weakly dropped on top of him, thus winning the match.
The trainer couldn't believe what was happening! He took the British wrestler aside, he asked, "How did you manage to get out of that hold? No one has escaped it before!"
The Briton answered, "I was about to give up when he got me in that grip, but at the last moment, I opened my eyes and saw this pair of balls right in front of my face. I thought I will give it a try, so with my last ounce of strength I stretched out my neck and bit them just as hard as I could. You have no idea how strong you can get when you bite your own balls!"