Some of the US Armed Forces activities do seem rather alien to Brits...
A WIWOL who'd had an exchange tour with the USMC told me that he'd been invited to join his squadron pilots on one of those strange chanting run things they do. To which he feigned an air of pained incredulity and replied "A run? A RUN?? My dear chap, you don't seem to understand. British officers don't run - it would panic the troops!".