Trapped in a cavern, no way out.

I had a dream the other night that has stuck with me. I just feel I should share it though I don't really have any questions about it, it's so obscure to me I can only imagine what it would be to someone else.

I'm in cavern underground that's been carved and is rectangular with 4 rooms and doorways connecting them. I share the space with a handful of other people and we aren't told, it's more understood that there is no way out. One of the rooms has no ceiling and the sky can be seen far above, the walls are around 30-40 feet high, and there's a sign that says ropes and ladders are not allowed. There are tapestries hanging from the walls all around and weapons decorating the room without a ceiling. Some time passes and the floor begins to get really hot until it starts to turn red and catch things on fire. Everyone in the cavern panics as the floor is bubbling in the corners of the room looking for ways to get off the floor. I wedged myself in a doorway and climbed up to the ceiling and someone fell into the lava next to me. I couldn't feel any of the heat from where I was and the floor quickly cooled and hardened again. I realized we needed to get out of there fast and told the rest. This guy said he'd help me find a way out and we searched the room with no ceiling for a way to climb. I don't remember exactly how we climbed out but it had something to do with intersecting raftors and climbing them in the right order, but we climbed anyway and escaped. When we got to the surface we were in Dallas, TX somewhere rural with lots of oak trees and houses. I used to live in an area similar too it in the Fort Worth/Dallas area but I didn't recognize this. We started to search for people to rescue the rest in the cavern and then I woke up.

Really one of the most vivid, crazy dreams i've had in some time at least.