The story
By analogy with a person jumping on a trampoline.
Etymology from Wiktionary, CC BY-SA 4.0.
trampoline effect
Today it means: The phenomenon by which the baseball "jumps" off the bat at contact. Full definition →
Today it means: The phenomenon by which the baseball "jumps" off the bat at contact. Full definition →
By analogy with a person jumping on a trampoline.
Etymology from Wiktionary, CC BY-SA 4.0.