Yeah, if u hit the wrong spot in those legs, that muscle will jump hard & not let u forget about the massive knot gathered in that area the following week. I can hit my quads every now & then, safely, but I'm thinking "please don't jump" the entire time. Lol. Palumbo is a hoot in the vid referenced above. Def worth watching. Love the fact all bros are here for each other instead of trying to cut on or rip someone for having a legit question, for them. Happy pinning