Related Clues:

• Fits
• Tics
• Throes
• Muscle woes
• Some jerks
• Muscle twitches
• Sudden spells of activity
• Nervous tics, e.g.
• Involuntary twitches
• Spurts of energy
• Muscular jerks
• Tetanus symptom
• Jerks that can't be helped
• Sudden movements
• They might be knee-jerk reactions