Lloyd Bridges' character Don Cortino is called "Don Cortizone" at one point in the film.
During the final epilogues of the main characters, Joey Cortinos text says he started an impotency clinic and has a website at "www.my stiffy.com".
A web address can't have a space in it.
During the funeral barfing scene, five people make the rainbow in coloured barf. When the camera pans, you can obviously see the tip of the hose on the 3rd or 4th person.