Related Clues:

• Isn't stoic
• Does a knee jerk, e.g.
• Looks shocked, e.g.
• Doesn't keep a poker face
• Isn't inert
• Flinches, for instance
• Screams or jumps
• Shows surprise, perhaps
• Hits back, say
• Shows shock, e.g.
• Flinches or frowns
• Strikes back, perhaps
• Settles a score
• Responds to an impulse
• Responds to stimulus