In my case we did learnt that at school, one exam was doing front and back mortal jumps (without any aiding mechanisms or wall helps) so if you wanted to pass gymnastics...

A pal broke its leg on two different points after not listening to the profesor saying "the class is over, dont jump anymore and pick the mats..." he had 6 months of recovery and never quite managed to run like before, i was scared enough to never do mortal jumps again since passing that exam...

Dont try your luck more than whats absolutely necessary...

OR you could contact psykotyk and do that in flames...