Some people like to put in things for people who have been in their lives. I’m sure someday I will, but my latest little cameo was to a player character in our gaming group that one of my characters killed.
He took a swing at her first. It was the last thing he did.
Anyway, I didn’t give him a glamorous or even remotely nice little place, but his name was mentioned. At the very least it entertained me and I’m sure once a couple of my upcoming beta readers (who are also players) get their hands on that part, it will make them smile (at least it wasn’t one of theirs I inadvertently killed).
Perhaps not the most Muse Monday worthy topic, but he ended up in a large section I rewrote and I had people look at me funny for giggling maniacally. Did I mention my characters were not fond of him to begin with?
J.C. Jackson 
Heh. That sounds like a fun injection. I don’t think I have one of those yet.