" In case you have any doubt about the level of danger, let it be stated unequivocally. Jousting is dangerous. A late-fourteenth-century knight will be wearing armor weighing eighty to one hundred pounds. He himself weighs perhaps two hundred pounds. He will be seated on a high saddle, charging toward you with a closing speed of about forty miles per hour on a destrier weighing more than a thousand pounds, and carrying a lance in which all the force is concentrated on a steel tip. Even if the tip is capped or blunt, the point of impact will be no more than a few square inches. The force exerted through that small area is enormous. If your opponent makes contact with your helmet, the blow may be likened to being knocked about the head with a hammer weighing half a ton, weilded at a speed of forty miles an hour. If you could not fall off your horse under such circumstances, you would not survive. Of course, falling off still means crashing to the ground from a galloping horse, in heavy armor, which is sometimes fatal in itself. "

― Ian Mortimer , The Time Traveller's Guide to Medieval England: A Handbook for Visitors to the Fourteenth Century