吓一跳

startled / to frighten / scared out of one's skin

to scare / to intimidate / to threaten / (interjection showing disapproval) tut-tut / (interjection showing astonishment)

to frighten / to scare

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

to jump / to hop / to skip over / to bounce / to palpitate