According to scientists a random website claiming to quote a Vanderbilt study, one can burn as many as 50 calories a day by laughing. Fifty calories! That’s half a 100 calorie pack of Cheez-Its! Good heavens. If you laughed off 50 calories a day, you could laugh off a full 4.4 lbs each year. Wouldn’t that be fun? The challenge, of course, is that you’d have to find something to…