pop 1 /pɒp $ pɑːp/ ●●○ S3 verb (popped, popping) 1 COME OUT/OFF [intransitive always + adverb/preposition] to come suddenly or unexpectedly out of or away from something
pop out/off/up etc
The top button popped off my shirt.
The ball popped out of Smith’s hands and onto the ground.
out/up popped something
The egg cracked open and out popped a tiny head.
The lid popped open and juice spilled all over the floor.
spill [intransitive] + adv./prep. (of people) to come out of a place in large numbers and spread out
The doors opened and people spilled into the street.
After the clubs closed, the drinkers spilled out into the streets.
Do you say "I accidentally opened the suitcase uncontrollably and the clothes popped out / spilled out over the floor"?
I am not sure if "pop out" or "spill out" are suitable words in this situation.