Often when i am dosing off i start to daydream. And sometimes i will accidently react to it physically. For example sometime ago i was daydreaming that a ball roled by and i put my hand out to grab it and i moved my real arm and it shocked me and broke my drowsyness. Or i will daydream that i am riding a skateboard or something and i will fall and it will make me like jolt up out of bed and shock me even worse. I think this proves why we all get sp and i wanted to know if this happends to anyone else.