A student discovered an old university rule that allowed him to get a shot of whiskey if he had to walk to class through temperatures below zero (Fahrenheit). He invoked the rule on a history professor whom he knew would be conversant with the university's history and thus know that the rule was for real. The prof congratulated him on his familiarity with the old laws, got him the whiskey - and then fined him two dollars for walking to class without a firearm of sufficient caliber.