how do I exmplain to my girlfriend that I ran over her dog with a tractor and I liked it?

3 days ago I was at the farm with my grilfriend and her parents and her dog. They were having a family discussion about whether hotdogs are better dry or wet and I was getting bored after having made some sweat so I decided to hop on the tractor and destroy some native flora and fauna. Anyway I rode around on there most of the afternoon, I got off at about 5pm because we were having dinner at 6pm and I figured I needed to clean the tractor and then have a shower. ANyway I was checking out what was stuck to the blades of the field slasher attachment and found one dog. Big win for the good guys!!! I don't want to come across like an asshole but I do kind of need to let her know I am very pleased with this development?