Patient has blank expressions, sometimes deafness to wife and kids. Frequent checking and reading of tractor magazines and manuals. Hangs out in parts shop longer than usual. Secret phone calls and meetins with tractor buddies. Mumbles to self.
Medication is useless.
Disease is not fatal. Victim must go tractor pulling as often as possible. Your neighbors think you are crazy, your friends wonder, and you know you are. 100 degrees outside, nature calls and the only porta potty is basking in the hot sun with an inside temperture of about 140 degrees.