Anyone got any tips on how to do that challenge?

The only way I can think of doing it is on 'Aftermath'. Throw yourself at the bowling ball to dislodge it but don't grab it, then ooch down to the girder directly beneath that the workman is on and try and grab hold of that, preferably at the end where the workman is.........Its a tough ask but its the only conceivable way I can think of doing it. If you watch the replays you'll notice the workman gets launched miles into the air so if you can grab the girder before the bowling ball hits it then you should too! Thats the plan anyway!!

Thanks, i'll try give it a go

if you land in the middle smoke stack in front of the greenish blue building on the right side, there is a bomb box at the bottom... if you can get in and out clean without your hat/sword/gun goin into the hole first, i just grab near the edge, hope my stuff goes flying, ooch over the edge and fall in.. the resulting explosion sets you flying, but i dunno, 300,000 feet?
if anyone has luck, lemme know, im gonna keep tryin it

moon landing is a challenge over time, it is a total of 300k hieght, not in 1 jump

in other words keep going down the chimney stack!!!