It's not a joke but an amusing comment I came across on a martial arts mesage board:
"Nahhhh I may be physically strong, but I still have flaws when it comes to fighting. You'll feel my punches though. I had 5 fights last night, and one of them was with a small Japanese girl...and she's very fast, and she told me to use 10% of my power, but she walked right into one of my punches to her liver, and I felt so bad...there is only one girl that I can actually fight with 40% of my power, and she's about 5'10 165LB...very pretty too. I like fighting women, because it teaches me to use control, and work on speed. One thing people do have a problem with though is keeping their hands up...I watch hands constantly, and if you drop any one of your hands for a split second...you will pay for it...but you'll probably never do it again...lol"