When you have a boner and lay down flat and start to spin on your peepee head and eventually you spin so fast that quantum mechanics break down and spacetime disintegrates.
Bill: "Hey man, I've been doing the quantum headspin alot lately. It sure does hurt!"
John: "What the hell is quantum headspin?"
John: "What the hell is quantum headspin?"
by jj the large jet plane December 30, 2022
Get the Quantum Headspinmug.