Our word of the day is tumble! This is a verb meaning to fall, roll, or move end over end. So not falling straight down, but more like in a rotating way.
If I have a closet stuffed full of toys and I open the door, the toys would tumble out. A bunch of puppies playing together might tumble around on the floor – they’re rolling and turning upside down and all around. An earthquake can make buildings and walls tumble down.