Serviced the two big clinics that I usually do on Sat. because they are closed. Much easier to service with no one around. Except for the "residents". One building has two rather large retention ponds. Beyond that is some undeveloped pasture where there are a few horses and cows. Well I'm working around the edge of one of the retention areas with the WB,with a velke. I'm minding my own business,just mowing,trying to get done for the day. I see what I think is a stick. I push down on the handles of the WB to lift a little to not hit it. IT MOVED! It was a Moc. And he's MAD now. It coils a little and turns TOWARDS the velke and gets aggressive. I jumped off the velke and to the opposite side of the mower,from him, to get away. Trying to stay in control of the mower AND stay away from this angry snake.This little dude was not afraid of the mower or me. Once I got past it,it fled in the other direction down into the nasty part of the retention area. My son brought over the ZTR. He took the WB and I took the ZTR to finish. We saw the Moc later and by this time it was calmed down. My son was freaked out when he saw it. We were within 6ft. or so and it was real calm. Not aggressive. Beautiful markings. About 3 1/2 feet in length. I let it be. I never go out of my way to hurt snakes for they have a purpose also. Lots of mice on this property and the snakes do a good job of "rodent control". This snake looked like it had just had a meal. Real close call,but a happy ending. Be careful out there. This was my closest call in 14 years. I did not think I could still move that fast!!