exactly my point. i never said doubles weren't possible on a circle tramp. double bouncing changes everything. although for anyone that weighs more than like 125 or 130 pounds, double bouncing doesn't always work. i know on every tramp i've been on, double bouncing makes me hit the ground underneath the tramp. not so fun, and i only weigh 150 lbs. doubles are certainly possible on a circle tramp. are they easily do-able? i think not.