The Night They Robbed Big Bertha's

I bought this movie for $1.00 at a flea market because the title was so odd - I finally watched it about two years later when I was drunk with my friends. I don't remember anything about it except at some point Big Bertha gets mad and shoots a gun while banjo music plays in the background. Oh, and I think one of the girls at the whorehouse is possessed... It's been about 10 years and I still have this movie on my person, and I don't think I've watched it since, but the title never ceases to entertain me. Actually I was a little surprised that this movie was even listed because the quality of my tape was so bad I assumed it was possibly a homemade dealie. Score 10/10 because who cares?