On Amaris Tyynismaa, the 14-year-old star runner who has Tourette’s.

A young woman with Tourette's syndrome spends time with her wayward friends.

"I am secretly hoping that the haloperidol (that Betty stole from my dad’s medicine cabinet) will allow me to feel as free as Betty seems to, moving through the world as a lobster skitters on the ocean floor. Though she is my best friend, I am never free of the suspicion that Betty is unfamiliar with my most basic mindset. I don’t think she’s ever been really depressed or picked at a mosquito bite until it bled or called somebody in the middle of the night and cried inconsolably when they answered. She rarely questions the wisdom or consequences of her impulsiveness, tongue-kissing strangers and spearheading midnight road trips, creating an ongoing mosaic of haphazard worldly heat that never needs revising or regretting."