[NotaJoke]

One major issue with this is security; what would happen if something went wrong with the pneumatic? What if you run out of air? What if there's a leak? When you're that high off the ground (level 3 being 90 inches!) you need to make sure that there is absolutely no risk of system failure.

This could work very well as a level one climb, however. Plus, in the event of an emergency (fall) the distance is only one third, and the damage sustained from the fall would be much less severe.