Well, this is definitely a strange one.... it's a black comedy from Hitoshi Matsumoto that takes on the Japanese "giant superhero" genre. If you get this movie (and please do, it's one of those rare classics), keep in mind you'll have to watch it subtitled, as it hasn't been dubbed in English.

I also won't spoil the ending, and I'd advise you to ignore the IMDB discussions on the subject until you watch the whole movie.

Here is the "Strange Flavour Monster" scene, in high quality: