Was mowing a commercial account Saturday when I looked up and this large dog was coming towards me. He was not afraid of the mower running and began to growl and bark, when he got really close I tried to scare him with the mower by running it towards him but he kept coming to the side snapping at me! I am sitting here thinking what the heck??? Never had anything like this happen before. I thought for a minute he was gonna jump up on the mower with me. I took off, the gravely will go 13 miles an hour, trying to out run him, which didn't work, and eventually he gave up and turned away. I was so ambarrased that I kept looking around to see if anyone was looking! Glad I wasn't trimming!!