Alvon Johnson

Charged Particles (keyboardist Murray Low, bassist Aaron Germain and drummer Jon Krosnick, pictured) and sax man Tod Dickow play a tribute concert to Michael Brecker at Red Poppy Art House on Thursday. (Courtesy photo)
Charged Particles (keyboardist Murray Low, bassist Aaron Germain and drummer Jon Krosnick, pictured) and sax man Tod Dickow play a tribute concert to Michael Brecker at Red Poppy Art House on Thursday. (Courtesy photo)
From left, Bill Corbett, Michael J. Nelson and Kevin Murphy, pictured at last year’s “RiffTrax-Night of the Shorts,” kick off the 2016 SF Sketchfest at the Castro Theatre with a new installment of the show. (Courtesy Tommy Lau/SF Sketchfest)
From left, Bill Corbett, Michael J. Nelson and Kevin Murphy, pictured at last year’s “RiffTrax-Night of the Shorts,” kick off the 2016 SF Sketchfest at the Castro Theatre with a new installment of the show. (Courtesy Tommy Lau/SF Sketchfest)