会议还没结束他就突然离开了。

He ___popped off before the meeting was over.

他脾气暴躁，经常对同事发火。

He has a bad temper and often ___pops off at his coworkers.

他刚退休就突然去世了，所有人都很震惊。

He had just retired when he ___popped off, shocking everyone.