Splinter

Total atrocity about a bizarre unexplained spiky mould that menaces a bunch of people whose only defence is a combination of mind numbing stupidity and horrendous, turgid dialogue ("It's ok, we're cutting your arm off" is one of the best).
There was almost a glimmer of something worthwhile when the threat takes on a larger creature form, but eventually I realised I couldn't tell whether people were screaming because they were being attacked by the monster or by the incredibly enthusiastic editing.