tumbling

fe’l verb

1. To drop rapidly. Share prices tumbled after the revelation about the company's impending failure.
2. To muss, to make disorderly; to tousle or rumple. to tumble a bed
3. To fall end over end; to roll over and over.
4. To perform gymnastics such as somersaults, rolls, and handsprings.

ot noun

1. The act of something that tumbles.