Explode
If you combine fire with violence, it will explode! A fire, once full of violence, will surely explode. The fire can’t handle all that violence so the fire just rumbles and shakes and then finally explodes. BOOM!
ばく
は
None
As you watch the fire explode, you start to back (ばく) away. I don’t blame you. You need to back away or else you’ll get caught in the violent explosion. Back away a little more just to be safe.