I find it funny that this movie isn't more popular due to the fact...
That that legendary David Letterman/Crispin Glover interview is totally explained if the viewer is aware of this film. Crispin was obviously portraying Rubin during the interview and even again in 1990 he is still trying to covertly talk about this film and his character.
I see that interview with Letterman on many Top 10 lists of strange, yet not even in this films Wikipedia entry do they discuss the connection.
Here it is...quality stuff...
http://www.youtube.com/watch?v=ALapHYNSmoA&feature=related