I had a deer jump out of a marshy area and across the rail-trail right in front of me. Had I been there one second earlier I'd have been hit broadside by it. The rail-trail was extremely narrow at that point and pretty well overgrown. Again, it was at dusk. I've seen many deer on the trail or just off it grazing and I keep a close eye open for them. However when they're in t all grass or other tall growth and are spooked, it can be like they just appeared out of a wormhole and you're very lucky if you miss hitting them or they miss hitting you. It's also quite surprising at how quickly they can move down a steep slope like a railway embankment.

Cheers