So I was riding home last night, and on a major thoroughfare in the city I pass another biker who was going about 3mph slower than me. This is a somewhat downhill stretch, so I was going about 23mph spinning at 125rpm smooth. A block later I see the same guy speeding up as he passes me going much faster than he was before. But this time he was bouncing up and down in the saddle, and dangerously zig zagging between cars. I'm pretty sure he was brakeless because he was skidding around.
So I decided to follow him a bit farther than I needed to, and he slows his pace back down and I go home.
Is it some kind of sign of machismo to pass someone, even if you can't maintain the pace you're passing them at for more than 30 seconds?