hmm my legs dont usually twitch..but my mouth always will if im really stoned. lol i remember the first time i ever experienced this i thought my drugs were laced with some sort of stimulant
sounds like you smoked some weed laced with meth...prepare for your life to spiral out of control...and yes you're going to die! that sucks lol.
Yeah I have twitched a few times, only when I get really stoned really quickly though. It feels kinda weird but when they stop I am always a lot higher haha.