Let's celebrate Star Trek violence, shall we?
Gotta love Worf.
First Contact and Undiscovered Country to me are the most violent Trek films out there. Arms getting chopped off, blood spurting around, and all that.
I love TUC, but really? couldn't take the attack on Gorkon seriously do to the Pepto Blood. As for First Contact--whatever problems I have with that one aside--it's not the scary or violent. About on par with the cantina scene in A New Hope or Empire Strikes Back's Wampa Cave or Bespin Duel. One of the problems I have with First Contact is they undersold the horror of assimilation.