Not lucid but..

I had a somewhat strange dream last night. It never became lucid, but it seemed like it might mean something. I was in a group of 3 or 4 people, and there were a lot of others elsewhere that weren't in my group. We were on a beach somewhere where there was a very steep, clifflike slope up to a lesser sloped area of grass, leading to mountains and hills and stuff. There was some sort of impending doom, like maybe a tidal wave or the sea level was rising or something, but either way we had to get to high ground. My group kept walking down the beach looking for a place to get up to the top, and tried a few times but only ended up getting stuck and had to carefully go back down without slipping. At one point we found a place that looked promising and I went up first. It was agonizing and nearly impossible, but I made it up to the top, where there was some sort of a hole in an overhanging cliff edge. With the help of the person below me (gave me a foot-up with his hands) I managed to get to where I was hanging onto the inside of this hole trying to pull myself up, but I just couldn't get the rest of the way up. Part of the edge I was trying to pull on broke off and fell down and almost made us all fall (and die probably) and that really freaked me out. I didn't know I was dreaming so it was REALLY scary. Not only was it dangerous for me, but if I fell I'd bring my friends down with me and they'd die too. So I managed to get up through the hole, but for some reason we couldn't climb the hill on top of the cliff. It didn't look like anything you couldn't just walk up, but we just couldn't do it. We ended up having to go back down and look for another spot. Except that once we got back down through the hole, there wasn't any real easy way to get down except jump, but it was like 30-40 feet down, so really bad. We tried to figure out another way but there just wasn't one. One of the members of my group ended up jumping, and he landed but broke his leg on impact. We all had to do the same though, but I told the rest that what we need to do is as soon as we hit, let your legs come up and roll. So I jumped down, rolled, and was OK (but it hurt.) The other 2 did the same and we made it. Then we started walking down the beach to find the next place to go up. We left the first guy there though, didn't even try to help him to the next place. I guess we knew he couldn't climb the cliff, but it seemed really harsh. I didn't know any of the other people I was with, but I know they were all very close friends of mine, and we were all in this together. I guess the situation was just so dire there was no way we could keep him from it though. What do you guys think this might mean? I am starting college again tomorrow for the first time in 3 years since I dropped out after 5 years trying to get my BS (and only getting 3 years worth of credits) so maybe it's related to that. Besides that, what do you think us just leaving one of our best friends to die with hardly a second thought means? I don't get that at all. Of course, being a dream, maybe it doesn't mean anything, but maybe it does, I dunno. Also, I think I'm going to create a sig for my posts now that I think I'm going to be here for the long term. How do I go about it?