OMG! AAAAALLLLLL the time! especially what thegreenman said. I was backing my cargo trailer to a job site, up a steep curved driveway about 700 yards long, and this homeowner comes running down the hill, waving his arms all frantic like, (I saw him in my mirror), so I stop, get out, thinking I had a child wrapped around the axel or something... no, "I'm just here to help you get up there". pffft messed up my mojo, and momentum. I wish I would have just sped up, except for...
Backing up wood chippers can be tricky with that super short tongue length. If no one's around to watch or "help" I'm a ninja. If someone (competent) is watching and helping, I'm OK. If a homeowner is watching... Look out mailbox!