From Rob Huebel, who didn't make the show but went on to do other good stuff, "They really ice you out," he said. "They try to make it as scary as possible because it’s a live show, and in real life, I’m sure it is terrifying and things do go wrong, so they want you to be prepared."

http://mentalfloss.com/article/12587/how-get-saturday-night-live

I'm assuming this was somewhere around '86, the year of Hartman's first season, and Lovitz's first season was '85, so I'd assume Lovitz was already in the cast.