The Globe and Mail - Adriana Barton - Mathew Sheppard can spend hours playing the video gam Minecraft, but he has trouble pouring water into a glass. Like other 13 year old boys, he loves hurtling through nature on an ATV. But when a waitress asks for his order, be blinks uncontrollably and shakes all over. Matthew has dystonia, a movement disorder that casused involuntary muscle contractions and spasms. More