Wife and I returning from a tour on a local MUP, last 20 miles or so. I'm following my wife, letting her set the pace. This strange fellow barely passes us then stays next to her around a blind bend and nearly crashes headfirst into an approaching roadie. He shouts "WTF?!" or equivalent while the passer continues ahead of us. I tell my wife "I'm going to catch him and tell him what he did wrong". I speed up to him and say "you need to pass quickly and get back in line to prevent crashes".
He says, "I'm sorry. I was passing that lady on the Trek 620 and the bike was so beautiful, I just had to look at it. My bad..."
True story. It is a really fine-looking bike. My wife's pretty, too, FWIW.
PG