John Mayer delivered an emotional rendition of “Ripple” as well as a heartfelt eulogy for the late Bob Weir at a public memorial for the Grateful Dead guitarist on Saturday in San Francisco. I come from a world of structural thinking, the concept, the theorizing, the reassessing, the perfecting,” Mayer said. “Over the course of a decade, we came to trust each other,” Mayer said of Weir. He gave me musical community; he gave me this community.” Mayer then broke into tears as the Deadheads saluted him. “He lent me his songbook, invited me into the worlds he’d constructed, and taught me what the songs meant and what it meant to perform them,” Mayer continued.