Yes. Nearly everytime with Cactus, Aya, Changa, Mushrooms etc.. Its like the body starts corrects itself in a natural way. Suddenly it feels natural withour tensions to have the shoulders back, straight neck etc etc.
Remember one time sitting in some half lotus posture and smoked somewhat overdose of Changa and got pulled into complete blackness without seeing or feeling anything. The only thing I could thought of was my body left in the lotus position. Normally knees and things starts to hurt a lot after some time but now I didnt feel anything from my body no more and my only concern was that maybe the whole body will brake down before I manage to get back to it haha.. Well it didnt
"Too cute to live, too cozy to die" - Eaglepath