Roger Corman is undeniably one of the most versatile and unpredictable directors/producers in history. He was single-handedly responsible for some of my favorite horror films ever (like the Edgar Allen Poe adaptations "Masque of the Red Death" and "Pit and the Pendulum") as well as some insufferably cheap and tacky rubbish quickies (like "Creature from the Haunted Sea" and "She Gods of the Shark Reef"). Corman also made a couple of movies that are simply unclassifiable and  simply put  nearly impossible to judge properly. "The Trip", for example, as well as this imaginatively titled "Gas-s-s-s" can somewhat be labeled as psychedelic exploitation. In other words, they're incredibly strange hippie-culture influenced movies. Half of the time you haven't got the slightest idea what's going on, who these characters are that walk back and forth through the screen and where the hell this whole thing is going. The plot is simply and yet highly effective: a strange but deadly nerve gas is accidentally unleashed and promptly annihilates that the entire world population over the age of 25. This *could* be the basic premise of an atmospheric, gritty and nail-bitingly suspenseful post-apocalyptic Sci-Fi landmark, but writer George Armitage and Roger Corman decided to turn it into a "trippy" road-movie comedy. None of the characters is even trying to prevent their inevitable upcoming deaths; they just party out in the streets and found little juvenile crime syndicates. "Gas-s-s-s" is a disappointingly boring and tries overly hard to be bizarre. The entire script appears to be improvised at the spot and not at all funny. Definitely not my cup of tea, but the film does have a loyal fan base and many admirers, so who am I to say that it's not worth your time or money?