Instead I just get the "Don't Fear the Reaper" moodlet and the reaper comes and sometimes he follows my sim around, but most of the time he just goes and gets himself a snack. My sims has made and drank the ghost goo serum about 20 times now. The only reason it bums me out is sometimes one of the work tasks is to scare a sim after drinking the ghost goo serum. I was also interested in trying to for a ghost baby.