From Chanel-
“Thanks for your question Sarah! This is an important question and I’m glad you’re asking before attempting the drop.
As long as you wrap for this drop correctly, you will still be safe, even if you miss the knee hook. If you miss the hook, you will end the drop with your wrap squeezing the thigh of the leg that would have hooked. Another important point to note here is that you must continue to hold on with both hands. This is because your grip on the tail is creating the tension that will squeeze your leg and catch you.
Let me know if you have any other questions regarding this.
Good luck on your training!”