Come on, if Huge Harold and his massive car actually existed there would have been photos. Selfie in the car, selfie of smol pixie next to massive car, photo out of windscreen, photo out of side window, photo of dash that (not so discreetly) shows what car it is!
Jack snaps everything. If there is no photo of it, then it doesn't exist/didn't happen. We're talking about someone who's complained about stalkers etc, yet has posted every single detail of their house to the point it's identifiable from her photos and description.