ERUPTS

Totally loses one's cool

• Becomes violently active

• Blows

• Blows off steam

• Blows one's stack

• Blows one's top

• Blows out

• Blows, as a volcano

• Blows, volcano-style

• Breaks out

• Bursts

• Bursts forth

• Bursts, as a volcano

• Can't take it anymore

• Comes out in a hurry

• Discharges

• Doesn't contain one's anger

• Emulates Etna

• Explodes

• Flares up

• Flies into a rage

• Flies off the handle

• Gives way to rage

• Goes ballistic

• Goes off

• Goes postal

• Gushes lava

• Has kittens, so to speak

• Hits the ceiling

• Lets off steam

• Lets out the lava

• Loses control

• Loses it

• Loses one's temper

• Makes like a volcano

• Mauna Loa does it

• Pops one's cork

• Spews

• Spews forth

• Spews lava

• Spews lava, say

• Throws off ash

• Vents like Etna

• Vents like Vesuvius