Break into

Somebody broke into his car and stole his tools and CDs.

Hackers broke into the bank's computer system and stole customer data.

I finally broke into the second package of cookies.

He hopes to break into show business.

The horse broke into a gallop as they neared the barn.

I just broke into tears while talking to my mom.

She broke into a smile, wrenching herself away from our head physician.

Now, sometimes in my sorrow shut, ⁠Or breaking into song by fits; ⁠Alone, alone, to where he sits, The Shadow cloak’d from head to foot Who keeps the keys of all the creeds, ⁠I wander, often falling lame, […]

Then, as usual, the sheep broke into "Four legs good, two legs bad!" and the momentary awkwardness was smoothed over.

That struck me as hilarious, and I broke into hysterical giggles. And once I began, I couldn’t stop. I laughed until I was gasping for breath, tears streaming down my face.