Other players were seen dropping to their knees in despair when their team were knocked out, we even saw tears on several occasions. (caughtoffside.com)
You can drop to your knees for most of the plank moves — work at your fitness level, and build the strength in your core and arms. (thebettyrocker.com)
Then drop to your knees and pop back into starting position and repeat. (ashotofadrenaline.net)