Dan crumbled the sandwich and threw it to the floor.

Sami's world crumbled.

She crumbled a biscuit.

The church we went past crumbled five minutes afterwards due to a huge earthquake and more than a 100 churchgoers were buried alive.

Sami didn't want his marriage to crumble.

Damn!  It hurts to see my identity crumble.

Sami's marriage really began to crumble.

I guess that's just the way the cookie crumbles.

Where did you crumble them?

Phew! It hurts me to see my identity crumble.