Some examples of word usage: burst in on
1. I was in the middle of changing clothes when my roommate burst in on me.
2. Please knock before entering so you don't accidentally burst in on someone.
3. The children burst in on their parents having a serious discussion.
4. I didn't mean to burst in on your meeting, I thought it was over.
5. The police burst in on the suspect's hideout and arrested him.
6. My boss burst in on me working late and offered to buy me dinner.
7. I was about to confess my feelings to my crush when her friend burst in on us.
8. The dog burst in on the room and made a mess of everything.
9. I hate when people burst in on me without warning, it's so rude.
10. The surprise party was ruined when the guest of honor burst in on the planning.