Task: Question Answering
Input (English): Context: Not dulling like it was supposed to . Was akin to the split second when someone pops out from behind a door and scares the hell out of you by accident , except with the door scenario your terror goes - down - because you recognize what startled you . It did n't go down . In fact , I suspect it went up a bit more as there was - no - light to go by . 
Question: What may be the reason for their fright ?
Output (English): They were n't expecting someone to pop out .