Sentence:  With a bolt of <WSD>fright</WSD> he remembered that there was no bathroom in the Hobhouse Room. He leapt along the corridor in a panic, stopping by the long-case clock at the end where he flattened himself against the wall. 
Meaning of the word marked with <WSD> tags:  A state of terror excited by the sudden appearance of danger; sudden and violent fear, usually of short duration; a sudden alarm.