This guy has tourettes syndrome and its fucking hillarious
Interview part 4 is my favorite one
http://www.tourettesguy.com/videos.htm
this is from http://www.tsa-usa.org/
There are also verbal tics. These verbal tics (vocalizations) usually occur with the movements; later they may replace one or more motor tics. These vocalizations include grunting, throat clearing, shouting and barking. The verbal tics may also be expressed as coprolalia (the involuntary use of obscene words or socially inappropriate words and phrases) or copropraxia (obscene gestures). Despite widespread publicity, coprolalia/copropraxia is uncommon with tic disorders.