A neighbor called the police and the man was charged with felony possession of a short-barreled shotgun or rifle and misdemeanor disorderly conduct while armed.
After his arrest, the man told the police, "I can do that, it's my lawn mower and my yard so I can shoot it if I want."
While this was a stupid thing for him to do, I have to admit that I fully understand how he felt and where he was coming from when he executed the errant Lawn Boy. Any of us who've ever owned a balky lawn mower can identify with him to some point.
Of course, with me, it's computers that get me to feeling homicidal (cybercidal?) more often than lawn mowers.