Related Clues:

• Cease being dormant
• Lose one's temper
• Go off violently
• Blow, like Dante's Peak
• Emerge violently
• Go off, as a volcano
• Blow, volcano-style
• Blow a gasket
• Vent one's anger
• Burst out
• Crack up
• Blow a fuse, so to speak
• Emulate Etna
• Flare up
• Let out lava