Sadly I have enough experience of looping through the risers to believe in general it is not a problem, I went through the risers on depolyement on at least 3 occasions as a student, until I hooked my leg one time and snapped a few ligaments, (ALL sub terminal)
Learn to DUMP stable as you will get hurt sooner or later, I did AFF and can now fall stable, dump stable, Remember PULL; PULL ON TIME and PULL STABLE, the first two should save your life the second will prevent opening injuries or a horseshoe
J
"Now I know why the birds fly"
Hinton Skydivers