throttle is probably stuck haha. it happens on these bikes. pull your carbs and clean em good. the slides get stuck up sometimes. take some fine sand paper and take it to the inside of the carbs. also make sure your throttle cable is routed as straight as possible and lubricate it good, they can jam and stick if it has to make a tight bend. glad you didnt get hurt, some people get scared and dont realize what to do when they stick, im usually not the smartest one in the bunch.