For the musicians on the Festival Express, getting there wasn't just half the fun. It was just about all of it.

		'Festival Express' Rating: R for some language Starring: Grateful Dead, Janis Joplin, The Band Director: Bob Smeaton

In 1970, two promoters booked the Grateful Dead, Janis Joplin, The Band, Buddy Guy, the Flying Burrito Brothers and more on a chartered train through Canada.

They played concerts along the way, but more significantly, the Festival Express was an amazing 24-hour-a-day rolling jam session. Said Dead drummer Mickey Hart, "There was a blues car, a country car, a rock 'n' roll car. It was like musical chairs."

Equally amazing is that this pristine footage, due to a falling out between the promoter and the filmmaker, has been hidden away in the Canadian National Archives for 25 years.

It's now been saved and edited down as a documentary loaded with priceless gems: The Band at its most raucous on Little Richard's "Slippin' and Slidin' "; a young Guy leading his band in a scorching version of "Money"; Garcia going gospel folk on "Better Take Jesus' Hand"; Garcia, Joplin and Rick Danko positively delirious (and probably tripping) on a version of "Ain't No More Cain."

Best of all is the rare opportunity to witness the whirlwind force of Joplin, two months before her death, on "Cry Baby" and "Tell Mama."

Not all was perfect on this trip -- fans in Toronto violently protested the ticket price of $14 -- but that just enhances its position as a great lost rockumentary.