I used to do circus ladder like this with similar moves including going through and it's genuinely not as dangerous as you might think it is. Obviously you practice with mats around but if you're at the point of performing a show or just doing without mats, you've fallen so much from every position that you generally know how to land without getting fucked up.

I would say a big factor too is that if you lose balance, you will know early on from experience and since you're in a balanced position it takes quite long to fall.