I am no expert on this but it has made me join this site.I have the same feelings.Also I use to walk down the street and think to myself stick your arm out while turning as if to indicate.Anyway I recently stumbled across a site about tourretes syndrome.As a child a had all kinds of strange habits.touching the floor,licking walls,nodding my head,making silly noises.the list is endless.I remember whenever been at the Drs my mum and the dr would order me out while they had there chat about me and my habits.Looking back wishing they would not have done this and involved me in the conversations.I use to get the name calling at school,the nicknames like Terry typewritter(due to the nodding)It was hard growing up but hey hoo.Anyway the reason I'm replying here is I've also read that this urge to hit someone is linked to tourretes.Ive never been diagnosed with tourretes but know for sure it's what I have.I live A normal life now I still twitch a bit more in private but it does not worry me,in fact I laugh about it