These movie cameos left fans in shock! For this list, well be looking at the most unexpected cameos from original cast members in new productions of their old work. Our countdown includes Ghostbusters, 21 Jump Street, Robin Hood: Prince of Thieves, Mad Max: Fury Road, Hulk, and more! Do you know of a notable cameo that should have been on this list? Let us know in the comments. Watch more great cameo videos here: Top 20 Best Movie Cameos Ever: