Dave Grohl has announced a release date for his documentary “What Drives Us.”  The flick will hit The Coda Collection and Amazon Prime on April 30th.  The Foo Fighters frontman described the project saying, “This film is my love letter to every musician that has ever jumped in an old van with their friends and left it all behind for the simple reward of playing music.”  The film includes appearances from Dave’s Foo bandmates as well as Ringo Starr, Flea, Brian Johnson, Slash, Duff McKagan, The Edge, Lars Ulrich, and Steven Tyler. Have you ever taken a long road trip with friends in a van?