A few months before I started writing for El Jalop, one of the few Mercedes-Benz F-Cell fuel cell cars parked on my block for while, and I'm still kicking myself for not photographing it. The anonymous tipster who sent in the shots of a Tesla Roadster he found parked in Palo Alto, on the other hand, had his camera primed and ready when the moment of truth arrived. Good work, anonymous tipster!