Often a prime factor when earning a Darwin award.
Years ago in Kalamazoo Michigan, I was cleaning my browning hi-power 9mm and just finished reassembling the pieces....then some numbskull barged into my 3rd floor apartment and was met with me and a gun in his face. He was drunk and just happened to walk into the wrong unit ... girlfriends was the next bldg over...I guarantee he remembers that faux pas . I didn’t pull the trigger:)