Neil Young's 26th annual Bridge School benefit concerts made their way to the Shoreline Amphitheatre in Mountain View, California this weekend, giving Bay Area music fans two days of a killer lineup, surprise guests, wild collaborations and other unexpected thrills. From Eddie Vedder's unannounced performance to Reggie Watts beat-boxing for the Flaming Lips, from Axl Rose and Neil Young's duet to the all-star finales, this year's Bridge School concerts were yet another unforgettable event in the festival's now-storied history. If you couldn't make it out to Mountain View this weekend, check out this gallery to experience all the highlights from this weekend's shows.