There's a paved greenway made from an obsolete railroad track that goes through Fords, Edison & Metuchen. It continues, unpaved, through Metuchen and out into the other side of Edison. I was mountain biking along the unpaved portion one day and there is/was a kind of mini-crevasse, maybe 3' deep and kind of broken up inside, in the dirt path. Couldn't ride over it or jump it because it was too wide.
I was just about to step down into it, carrying the bike, when a loud rattling sound came out of it. Looked closer and there was a rattlesnake coiled up right on the ledge where I was going to step down to.
Needless to say, I found another way around.