Reading the other comments for this film here on IMDb, one might be forgiven for being a bit confused.
Some people claim that this is one of the vilest pieces of filth ever committed to celluloid and only the sick and depraved would be able to (or want to) sit through it in its entirety. This couldn't be further from the truth.
Other comments describe scenes of torture, abortions, real animal killings, castration, decapitation, mutilation, and humiliation. God only knows what film they were watching, but it sure wasn't Keith Li's Centipede Horror.
However, select 'prolific authors' in the comment filter, and you get a much more accurate account of the film (thank you EVOL666 and HumanoidOfFlesh for your always reliable contributions).
Centipede Horror is actually a fairly hum-drum serving of HK supernatural horror that is enlivened occasionally by some silly black magic mumbo-jumbo and a spot of creepy-crawly nastiness for all those afraid of many-legged mini-beasts.
The film begins with a young woman and her friend travelling to SE Asia where they are bitten by poisonous centipedes, which ultimately cause their deaths. The brother of one of the girls decides to investigate his sibling's strange demise, and discovers that his sister was the victim of a spell, placed on her by a magician seeking revenge for a terrible act perpetrated by their long-dead grandfather. And now he's after the brother too! The first 40 minutes of this film is almost coma inducing, and only the most committed of horror fans will make it past this point. Those that do will then be treated to an entertaining 'exorcism' involving a naked woman with a green stomach, two ghost children, and some yucky bugs.
From this point on, things thankfully get more interesting, until the effective finalé which features loads of scuttling critters and a wonderful closing moment which is guaranteed to make you gag: a woman graphically throws up several large centipedes!!!