The Knife Tossers

Two men toss a sharp knife back and forth.
They catch it each time.
One man tries to catch it in his teeth, and with a head-spin he comes up smiling, blade in his mouth.
He tosses it to the other man, who leaps and kicks at the knife, catching it in his toes.
This goes on for hours, until one man is lying on the sand, knife buried in his chest.
The other man pulls it out, wipes the blood off on a sleeve, and says “So, what do you think of my suggestion to flip a coin now?”