I have smoked marijuana on and off for about a year, not ever more than about once every other week. The last two times I smoked, I experienced uncontrollable tremors in my leg. It wasn't painful like a muscle spasm, but it was uncomfortable and unsettling. Was this merely nervousness (this was the first time I had people "over" at my own suite to smoke and I was a little worried that my roommates would be angry)? Or, could this be a side effect of the drug?