Tribeca got groovy in its 10th year, opening with The Union — Cameron Crowe’s tender, affecting chronicle of the making of Elton John and Leon Russell‘s 2010 album of the same name. Among its revelations: John was originally offered the lead role in the 1971 cult classic Harold and Maude. Paul McCartney, Tommy Lee, and the Wizard of Ozz himself reminisce in God Bless Ozzy Osbourne, a blood-and-(bat)guts take on the Iron Man’s wild life. Less fun? The Swell Season‘s tedious eponymous doc, in which Oscar-winning Once couple Glen Hansard and Markéta Irglová — now unhappy exes — come off, well, not so swell. The raunchy, all-access Talihina Sky: The Story of Kings of Leon traces the band’s adventures in sex, drugs, and Bible-thumping, while the more sobering Beats, Rhymes & Life: The Travels of A Tribe Called Quest is part celebration and part sad epitaph for the ’90s hip-hop heroes.