Bucky wasn't kidding about the weight, making Tony grimace and very quickly regret the offer, but he could dig his armored elbow into the stone for some leverage until Bucky released him and left him feeling...not much better, honestly, exhausted and squirming slightly to keep himself aloft. With Bucky's voice as a reference point, though, he didn't have to for long, only signalling his intent in the way he dropped to hang from his fingertips again, toes pointed and kicking like this time they might reach further to the ground. When he did fall, it was with much less grace than Bucky, weighted as he was by his boots and, as noted, not exactly a super soldier.

It was only when he hit the ground that he responded, "Of course not."