Crash Test Dummies

There was a boy who liked to wiggle
His tooth loose so he could show it:
And then we'd watch while he would
Tie it to a doorknob, wind up, and then slam it!
And that was how he liked to have his teeth pulled out;
He told us how he liked to feel it when it came out
But he grew tired of using doorknobs
And so he thought up a brand-new trick:
He said he'd tie his tooth
To his dog's tail, find a stick, wind up, and then throw it!