One day, a scuba diver was enjoying the aquatic world 20 feet below sea level. Looking around, he noticed a guy at the same depth but without any scuba gear on. The diver decided to go down another 20 feet.

He took another look around, and lo and behold, there was the same guy.

"I can't believe it," thought the scuba diver, "I bet he can't go down another 25 feet."

So the diver goes down another 25 feet and, again, there is the guy! Totally amazed, the scuba diver pulls out a chalkboard and writes, "How the heck are you able to go so deep and stay under so long without any equipment?"

The guy grabs the chalkboard and writes,

"I'm drowning you moron!"