Yes it is. My boys decided after being told to put the plastic grocery bags away, to instead use them to perfect the art of "plastic bag parachuting off the couch." Surely if one, two, or three bags wouldn't do the job, then 5 or 6 Definitely will. They got several jumps in via off the back of my couch and practiced different combos: Picture this 3 bags attached to their backs like backpacks via arms through the handle holes then holding 2 or 3 above the head as they launch....unfortunately, as all other children before them have learned as well, there isn't enough lift in the bags or distance between the top of the couch and the floor to get carried by the bags. I'm glad they didn't think to try from the top of their bunk beds :)
