What movie was this?

When I was little, my brothers were watching a horror movie on tv one night. I saw a tiny bit of it, and a large creature was stalking people in a cave, attacking, and killing them. I think a lot of the people in the cave were part of search and rescue team, and I could swear I remember Kate Mulgrew, or someone that looked like her, was one of the people in the cave. The creature had large, slender, interlocking teeth, and was probably the size of a liger. I remember one scene in particular where the creature snuck up on Kate Mulgrew and an associate and attacked them. It pushed them off screen and looked back into the camera with its mouth drenched in blood. I remember because I went to brush my teeth after that, and when I turned the water on, the faucet handles shot off the sink, and there was a huge geyser or water. It scared the crap out of me, and sent me running, and screaming because I was sure the creature was in the basement....you had to go through the bathroom to get to the basement, so, I was outta there.