i think it comes as small facial ticks for tim, if you watch him closely sometimes you can see his head jerks slightly to the side, i know this as i suffer from a similar thing myself, and i also work in a unit for people with brain injuries, some of whom have tourettes too.being called a c*nt is only the tip of the iceberg with it, wait till you have a mug of hot tea thrown over your head because you have told someone you want to make them some breakfast!!!