Related Clues:

• Bully's weapon
• Be more than concerned about
• Agoraphobia, e.g.
• Partner of trembling
• '-- not' ('Nope, no can do')
• Claustrophobia, for one
• It causes adrenaline to be released
• Goose bumps cause
• The willies
• One of the great motivators
• "In time we hate that which we often __": Shakespeare
• Cause of some quaking
• Adrenaline trigger
• Expect with alarm
• Emotion conquered by daredevils