multimedia systems consisting primarily of multiple subsystems, namely cameras, such as light-weight and waterproof cameras, that capture and produce multiple digital video streams, and microphones and amplification equipment that capture multiple digital audio streams, and data acquisition systems consisting primarily of accelerometers, gyroscopes, GPS receivers, wireless audio/video and data receivers, hard drives, and flash memory cards that acquire data from vehicles and/or rides and from on-board sensors, for monitoring, recording,storing, retrieving, managing, and playing synchronized multimedia content regarding activity and biophysical conditions in and around vehicles and other mobile environments