I have only watched one so far
The Mangler 2: Graduation Day is a 'sequel' to Tobe Hooper's adaptation of the excellent Stephen King short story.
I haven't seen it, but this doesn't matter as this is a sequel in name only. While The Mangler was about a possessed and murderous laundry machine, this film is about a murderous computer virus let loose on a school with the oldest teenagers in the world, a comedy French chef with a cig permanently glued to his lip, and the headmaster, Lance Henriksen.
It looks like they spunked all the budget on Lance Henriksen cos it's not in evidence in the sets or the special effects.
It's not even gory, with most deaths happening offscreen and it doesn't even have any boobs in it, so it pretty much fails on every level. There are a few unintentional laughs, mainly from the appalling script, but also from the scene in which Lance Henriksen gets possessed and becomed half=machine with wires sticking out of him.
The plot isn't even original, as they nicked it off another execrable King adaptation, The Lawnmower Man.
So bad, it's bad.