Related Clues

• Isn't inert
• Does a double take, e.g.
• Isn't stoic
• Loses one's temper, say
• Jerks the knee, e.g.
• Takes countermeasures
• Doesn't keep a poker face
• Flinches or frowns, say
• Does a spit take
• Flinches, perhaps
• Shows emotion
• Undergoes a chemical change
• Flinches, e.g.
• Blushes, maybe
• Looks shocked, e.g.
• Gasps, perhaps
• Strikes back
• Changes chemically
• Responds to stimuli
• Flinches, for instance