Silly bit of fluff about a teenage tomboy named Billie (Patty Duke) who can run super fast due to music in her head she calls "the beat." She can run faster than all the boys, which causes the expected problems. This is an old but fun gender equality story. It's sincere in what it's trying to do even though it's pretty dated in how it's trying to do it. Patty Duke is fun and looks cute in track shorts. 28 year-old Warren Berlinger is her friend (and potential boyfriend). He's a poor fit to play a high schooler. He even has a bald spot! Jim Backus plays the dad and Jane Greer is the mom. Backus' character is one of the more interesting in the film, seeing as how he is a politician running on a traditionalist conservative platform yet his personal views are somewhat in conflict with this. He's a hypocrite, in other words. Other familiar faces like Dick Sargent, Charles Lane, and Richard Deacon also appear. It's likable stuff but not for everybody. The scenes of Patty Duke running with that big grin on her face and the '60s music playing is pretty cheesy stuff. Patty sings some corny songs, as well. The subplot about the older sister is positively stupid. You're not going to enjoy this movie much unless you are able to not take it that seriously.