“Knock your bad self out.”
“If you enjoy knocking self-publishing writers, write something better first, then, knock on!”
“Relax, the bad guys don’t knock. (Romeo)”
“I don't care if you got knocked up. I can still rip your throat out”
“Back so soon?" he asked. "Too bad. I was just about to organize a search for your dead body. What happened when you knocked on the southerner magician's door to sacrifice yourself? Did they kick you out, thinking you too half-witted to waste their time on?”
“Knock yourself out.”