Yesterday I was out on one of my typical 30-40 mile rides. On this particular day I was using a long section of the MUP to complete my route. I came up on a guy(I think since I never saw his face) on a recumbent bike. As I neared him (25 yards) he must have sensed me and he proceeded to accelerate. He buzzed through a cross-street and I had to basically stop due to traffic. After that it was a straight 5-mile shot and I never got closer than 100 yards. I maintained my speed between 23-25mph (path was empty) and couldn't gain any ground on the guy. Amazing athlete this person had to be to keep a trike going at those speeds. This wasn't one of the supine position trikes or two-wheeler with a fairing. Look like he was going to pedal himself right out of his seat. Not your atypical recumbent sighting.