Unpleasant Surprise! is a mythos card. It first appeared in the Innsmouth Horror expansion.
Mythos Type: Headline
Gate Opens: Esoteric Order of Dagon
Clue Appears At: *Devil Reef
Mythos Ability: If the terror level is 8 or higher, or there is only one empty space left on the Ancient One's doom track, then the Ancient One immediately awakens.