burst into

US /bɜːrst ˈɪntuː/
UK /bɜːrst ˈɪntuː/
"burst into" picture
1.

éclater en, fondre en

to suddenly begin to do something, especially to produce something such as tears or laughter

:
She burst into tears when she heard the sad news.
Elle fondit en larmes en apprenant la triste nouvelle.
The audience burst into applause at the end of the performance.
Le public éclata en applaudissements à la fin de la représentation.
2.

faire irruption dans, entrer en force

to enter a place suddenly and with force

:
The police burst into the room.
La police fit irruption dans la pièce.
He burst into the office, looking for his boss.
Il fit irruption dans le bureau, à la recherche de son patron.