Wow! I heard of this documentary a while ago, but never saw it until now. This Czech movie is about student who gets an assignment to make a study about metal and he then finds about the band called Malignant Tumour who have been playing since 1991., the movie was made in 2016.so it was 25 years they played back then. This movie is about the band, but also about discovering metal and punk hardcore scene, underground, which becomes eternal love for the main protagonist through going to gigs, hanging out, even becoming friends with the band. It also provides a fine picture of the band, since their extreme grindcore beginnings, to nowadays they provide hell of a show with their mixture of crust punk and roll. Their charismatic frontman Bilos and the rest of the band speak about the band and the past also present themselves, but also lot of extreme underground music legends talk about the band in the movie. I almost choked laughing in the part of the movie where band gets Czech music award for the best hard and heavy band, you should see that and also I would recommend this movie, I am not total fan of the band. Great one!