Yeah, you definitely feel the rock in the beginning but it seems to go away and the sherm takes over pretty quickly. (maybe its because I like sherm better so I tend to focus on that aspect of the high) One of my homeboys looked like he was about to go into cardiac arrest when he hit it the first time. He instantly started sweating badly and was having some bad chest pains, but he was cool about 15 minutes later, but his body didn't react to well to that shit.