The fundamentally playful spirit of director Davis Guggenheim’s approach to profiling actor Michael J. Fox feels like a perfect match for the way the actor approaches his own life, trials and all. While in part it’s a full biographical profile of Fox’s journey from Canada to Hollywood stardom, it definitely focuses on the here-and-now consequences of his 1991 diagnosis with Parkinson’s disease, with scenes addressing his physical therapy regimen and the struggles he faces trying to record the book-on-tape version of his latest memoir. But it’s the way Guggenheim deals with the background material, employing a mix of dramatized re-creations and scenes from Fox’s movies to capture events—like the grueling pace of Fox’s schedule while simultaneously shooting Back to the Future and Family Ties episodes—with tremendous energy. It’s certainly true that Fox’s own perspectives add a lot to the story, particularly the anxiety involved in his post-diagnosis/pre-public statement years when he simultaneously feared for his own health and the future of his career. It helps a lot, though, for all of that stuff to be contained in a movie that’s flat-out fun to watch, one that never for a moment suggests feeling sorry for its subject.