• Breaks open
• Breaks open suddenly
• Erupts
• Explodes
• Explosions
• Fireworks displays
• Flare-ups
• Flies apart
• Flurries
• Intense periods of productivity
• Machine gun volleys
• Pops
• Pops like a balloon
• Pops, as a balloon
• Pops, as a bubble
• Spurts of energy
• Sudden emissions