break open (
http://definr.com/break open)
v 1: open with force; "He broke open the the picnic basket"
2: break open or apart suddenly; "The bubble burst" [syn:
burst,
split]
3: erupt or intensify suddenly; "Unrest erupted in the
country"; "Tempers flared at the meeting" [syn:
erupt, {flare
up},
flare,
burst out]