Gunnar Ferdinandsen's departure and early birthday party at ILM after completing his work on "Ghostbusters II" in 1988.
http://www.imdb.com/name/nm0272256/
http://lunaprod.library.cornell.edu:8280/luna/servlet/detail/CORNELL~1~1~12482~2970034:Chris-Mueller--Gunnar-Ferdinandsen-