I saw them in the routine and thought "3 sets of 6 reps that's not bad at all should be much easier than the 10-15 reps per leg I've done before." Uh no.
"And for crying out loud. Don't go into the pain cave. I can't stress this enough. Your Totem Animal won't be in there to help you. You'll be on your own. The Pain Cave is for cowards.
Pain is your companion, don't go hide from it."