Related Clues:

• Impatient and anxious
• Showing strain
• Skittish
• Avant-garde
• Easily upset
• Overstrung
• Experiencing jitters
• All keyed up
• Having the jitters, perhaps
• Anxiously impatient
• Like some performance art
• About to snap
• Pushing the envelope
• Like a bundle of nerves
• Innovative and daring