I came across the following passage of text in one of the original Thomas the Tank Engine stories, and realised there was a phrase in there that I didn't understand.
"Be careful with the coaches, James" said Edward, "they don't like being bumped. Trucks are silly and noisy; they need to be bumped and taught to behave, but coaches get cross and will pay you out."
James the Red Engine, Rev W. Awdry (1948)
So what does "pay you out" mean?