This one's been around for awhile -- more than 70 years, matter of fact -- but on a slow Tuesday, it's worth running: rules for playing golf during wartime.
Now, this seems to dance along the edge of believability, particularly rule No. 7, but a Snopes.com investigation found versions of these rules in contemporary newspapers. And according to historians, German planes on bombing runs to England would wax up their gun barrels to prevent freezing, and then blast off the wax while flying over golf courses.
Still, true or not, these rules remain useful to this day. And if one of the lower-tier tournaments decided to liven up its early rounds by shelling players with a few bombs out on the back nine, hey, the rules are already established.