The last time i was a smart butt about this i was sawing wood on my table saw my wife walked by and told me to be careful being hot tired and just not in the mood i stoped and explained that i had been using saws all my like and never been cut. About 20 minutes later we were on the way to the emergency room. A dozen stiches later headed home. Anytime i get the urge to be a smart butt my wife just says been doing it all my life. You can't imagine how many times i have heard that.