twitches used to happen to me all the time and i used to get embarrest about it in front of more 'experinced' smokers... untill i realized that is is down to stress really... the more stressed i am the more i twitch when im smoking.... i guess its a release of some kind... try laying down while smoking if you is twitching too much.... it helps me... but hey... we all do it and its all good fun!

xxx