The story isn't the LEAST bit believable, and the dialogue doesn't make much sense.
There's lots else that doesn't make sense about this movie. Where the random barrels of fire around the underground basketball court came from remains a mystery to me, for example.
There was a period of time that this was the lowest rated film on all of IMDB. While I don't think it is fair to call it the worst film ever made, it is terrible (though there is something oddly entertaining about how truly bad it really is). It certainly has many "so bad it's good" moments.