He told a hilarious joke, and we all started to crack up
The comedian's performance was so funny, the audience couldn't help but crack up
She's been under a lot of stress lately and seems like she might crack up
I told him the story about the cat and he just cracked up laughing
Don't be so serious all the time, you need to learn to crack up a little
The old car's engine started to make strange noises and sounded like it was going to crack up
He's such a funny guy, he always manages to crack up his friends
When she saw the silly costume, she started to crack up uncontrollably
If you push him too hard, he'll probably just crack up
The constant pressure of the job made him feel like he was about to crack up
That joke was so funny, I almost fell off my chair.
Seriously? I didn't think it was that good. You always crack up easily.
Hey, at least I have a good sense of humor!
The comedian made the audience crack up
The comedian made everyone laugh a lot
The comedian caused the audience to roar with laughter