Autopsy

Autopsy exists primarily to provide gory scenes. From the opening several people manage to crash into some random guy. An ambulance shows up despite not being called but everyone is in shock. Unsurprisingly, nobody notices. They're in shock. Gory films don't usually interest me but at least this one achieved some shock value.

Therefore everyone arrives at the hospital where insane paramedics, doctors and such try to experiment on their newfound victims or murder victims.

Naturally the story doesn't matter because it's only setup for gory stuff that comes later. The kids are only there to be victims.

However, although I consider "Event Horizon" and "Hostel" unmemorable, and "Hostel 2" groan-inducingly stupid, Autopsy actually managed to shock me during at least once.