A hunter was rushed into the emergency room with a bear trap clamped onto his testicles. As the horrified doctor was examining him, he said "Man, how did this happen?"
The hunter explains that he was out in the woods and felt the call of nature. Bending down by a tree, the bear trap was triggered and snapped shut on his testicles. "Oh," exclaims the doctor, "The pain must have been excruciating!"
"It was," said the hunter. "The second worst pain in my life."
"Second worst? What could have been worse than that?"
"Coming to the end of the chain" said the hunter.