I think I can better describe the body effects as last night a good explanation came to me.
Its not so much 'jello bones' as it is uhh, visualise your body painted on a square of saran wrap. Then pinch ur fingers on lets say your left shoulder on the saran wrap you, then stretch that peice of saran wrap away from your body. Now do that in 3 different parts of your body in 3 different directions all at once, and that is how your body feels when ur just standing perfectly still on PCP.
Example my left shoulder will feel like its 'disconnecting' from its shoulder socket and theres an incredible desire to lean into the direction it feels its pulling away from, in some attempt to 'reconnect' it to the socket, but at the same time, my right knee feels like it detaches from the rest of me and is moving in the opposite direction of my left shoulder, so now to look at me youd see my hips and up leaning dramatically to the left to 'follow' my disconnecting/drifting shoulder, while from hips down my legs would be bending in the opposite direction, trying to follow my drifting kneecap.
Then at random, the directions and locations in which my bodies being pulled change and shift suddenly, usually followed by an immediate drunken-like stumble as the center of gravity and everything seems to change in an instant, so my posture immediatly re-adjusts to 'follow' the new parts of my body that feel like theyve detached from the rest of me and are going to float away into the cosmos. This is what creates VERY VERY bizarre looking posture. The body instinctively tries to follow the sensationalized thought that its joints are disconnecting and floating away from the rest of it which results in leans, twists, and various angles of movement that are totally abnormal yet practically uncontrollable.
Last night I lost my shoulders, my knees, my elbows, my eyes, my nose, and my lips, they all detached and drifted away from me... such the strange feeling. When theyve fully 'detached' they become completely numb (imagine NOVACAINE numb) where you can feel the area and the 'touch' is registered in the fingers ur feeling with, but not in the area ur feeling.