The artwork depicts a tatami (畳). Tatami are mats that are traditional Japanese flooring. Made of woven straw, and traditionally packed with straw, tatami are made in individual mats of uniform size and shape, bordered by brocade or plain green cloth.
This is most likely a reference to "Tatami Gaeshi", a "trick" which is believed to have been used by ninjas. It involves carefully timing and flipping a tatami vertically to block incoming projectiles.
The English name may refer to a trick popular in America cartoons, when a long carpet is pulled out from under a person, causing them to fall.