An Irishman, an Englishman, a gorgeous looking buxom blonde, and a little old lady share a carriage on a train.
Train enters a tunnel and the carriage goes completely dark. There's a loud SLAP then the train emerges from the tunnel with the English guy looking sheepish and a big red welt on his face.
The little old lady thinks "That English guy tried his luck with the blonde in the darkness and got a right good smack for his troubles"
The buxom blonde thinks "That English guy probably thought he was touching me and touched the little old lady instead and got a right good smack for his troubles"
The English guy thinks "That Irishman tried his luck with the blonde in the dark, she thought it was me and I ended up with a right good smack as a result of it"
The Irish guy thinks "I can't wait for the next tunnel so I can smack that English c*nt again"