1) Becomes violently active 2) Blows off steam 3) Blows out 4) Blows up 5) Blows volcano-style 6) Boils over 7) Breaks out 8) Breaks out suddenly 9) Bursts 10) Bursts forth 11) Bursts out 12) Emulates etna 13) Explodes, like a volcano 14) Flies into a rage 15) Flies off the handle 16) Gives way to rage 1) Bursts