ITW, Newquay, summer 1941. We'd only just arrived: the Airmen's Dining Hall was in the commandeered "Trebarwith" Hotel. Cold meat (probably "Spam") and salad for dinner tonight, chaps.
One chap had not examined the lettuce he'd just picked up carefully enough. Back at the table, when he turned it over on his plate, there was an inch-long black snail busy munching away at it.
"Orderly Officer ! - Any complaints ?" .... Despite silent hard prodding by his two tablemates, our lad was far too shy of authority to say a word. The Orderly Officer and Sergeant hadn't noticed the snail, and walked away.
No - he didn't eat it ! But he never lived it down for the six weeks of the Course, and had to answer to "Snaily !" for the rest of his time with us.