What is it called when you push down a chair and you go with it answer asap?

-this is for a project i need to know the name for this so say you stand on a chair put your foot where your back would go push down and you go down with the chair you would probably see this in a free running film or action film like where they are running about so they quickly get up on the chair and push it down need to know the name of it asap!