break open

verbs

open with force
"He broke open the picnic basket"
break open
is a type of (narrower)
cause to open or to become open
"Mary opened the car door"
open, open up
come open suddenly and violently, as if from internal pressure
"The bubble burst"
break open, burst, split
erupt or intensify suddenly
"Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism"
break open, burst out, erupt, flare, flare up, irrupt