It's a combination of alcohol, young men and machines.

Trauma for vehicular accidents drops off until the snow hits the deck. Then the snow melts away and the numbers drop.

Young kids aren't strong enough to hold on.

Trauma is particular to the season.

As machines get to be more and more like men, men will come to be more like machines

Computing machines perhaps can do the work of a dozen ordinary men, but there is no machine that can do the work of one extraordinary man.