I tossed a coin. We're drawing.
The problem lies in how we get each other to draw. I'm going to just say something off the top of my head here, though.
I charge with my spear, you aim your rifle. The dust settles, and the audience sees the position we're stuck in. I've got my spear to your throat, and you've got your rifle pressed against my forehead. There's a mutual agreement to call it a draw, as the match could go either way in a split second, and neither of us want to take the risk.