ok, after reading that article about Craig Nordstrand, I too must admit that 'do you want karate ?' was a little lame for a warning line.

So here is KFM's chance to give both creative and intimidating line which could be used to warn off potential attackers.

here is a few I thought up

"When I am through with you, Satan is going to abdicate to me"

"I once handled 5 girls in one night. You think you can even come close ?"

"Plastic surgeons changes your face for money. I'll change your face for free"

"I am still paying the hospital fee of the last person who pecked a fight with me"

"You guys are a bunch of sissies. And if you have a problem with that, you can direct it to Mr Hulk here next to me"