Back to the Future is a highly imaginative motion picture which prospered at the box office several years ago. The film features a madcap scientist who perfects a machine capable of achieving the human dream of traveling through time. A teenaged boy uses the machine to journey to his hometown as it was in the 1950s, before the boy was born. What happens in the movie from that point on is, of course, ludicrously good fun. The boy meets his parents and discovers what they were like in their awkward teenage years. He dazzles the populace with the unknown sport of skateboarding, and he even manages to introduce Chuck Berry to the throbbing guitar licks of the as-yet-unwritten "Johnny B. Goode." Signs of 50s quaintness abound, from soda bottles whose caps will not twist off to a service station…