From IWS because I couldn't have said it better:
"Over the years, horror movie protagonists have been forced deal with foes wielding a diverse arsenal of chainsaws, knives, machetes, saws (Saw wielded a saw, right?), and basically anything that can be used to stab or bludgeon someone. But there's one deadly weapon that's always been considered too big a threat for even the horror genre to take on... until now! I'm talking of course about splinters. Like "splinter" splinters? The non-threatening nuisance? Yes. But in this case THEY'RE DEADLY. I guess.
By the way,
Splinter, "splinters" and "spines" aren't the same thing. Just something to keep in mind for Splinter 2.
Here's the trailer. I wish there were tweezers strong enough to pluck it out of my memory."
Trailer