When a delivery guy took over my bricklaying for five minutes

I was working on a small brick patio with a coworker yesterday. A delivery driver pulled up to the house next to ours. He watched us for a bit, then said he used to lay bricks as a kid. Next thing I know, he hops off his truck and grabs a trowel. He started putting bricks down all willy-nilly, saying his way was quicker. My buddy and I just stared, not sure what to do. The homeowner came out and asked if we hired extra help. We all had a good chuckle about it after. Has something like this ever happened to you on site?