Related Clues:

• Some jerks
• Muscle twitches
• Tetanus
• Sudden spells of activity
• Nervous tics, e.g.
• Involuntary twitches
• Spurts of energy
• Tetanus spasm
• Muscular jerks
• Jerks that can't be helped
• Tetanus, more familiarly
• Sudden movements
• Bursts of energy
• They might be knee-jerk reactions
• Involuntary muscle contractions