Taken Aback
Amazed, Horrified, Flabbergasted
noun, verbal noun
ぎょうてん
仰天 (ぎょうてん) Taken Aback, Amazed, Horrified, Flabbergasted
呆気 (あっけ) Dumbfounded, Taken Aback, Astonished
He was Taken Aback by a gyoza ぎょう ten てん times his size.