John Heginbotham will host a free interactive documentary film screening of Capturing Grace, accompanied by a presentation on Dance for PD, a program he helped develop that offers specialized dance classes to people with Parkinsonís disease, at 7 p.m. April 4 at the Tarpon Springs Heritage Museum, 100 Library Lane. Also in April, the Neuro Challenge Foundation for Parkinsonís will host the first Parkinsonís Expo. The free event will be from 9 a.m. to 3:30 p.m. April 14 at Robarts Arena, 3000 Ringling Blvd., Sarasota. Registration is required at neurochallenge.org (under EXPO). A free boxed lunch will be provided. Experts from around the country will talk at the expo, and the keynote will be given by Tim Hague Sr., who became the inaugural winner of CTVís The Amazing Race in Canada three years after being diagnosed with Parkinsonís. There also will be demonstrations.