I dreamt that me and my guy friend were on his parent's large boat and there were 2 other couples. We must have been in the area where the eater is let in and out by gates, like the delta. Anyway, the gates were made of thick concrete and they swung up and down. The water was able to rise and fall this way. We were waiting for one of the gates to open, before the water rose too high and it just was not quite able to make it all the way up.. All of a sudden I realized this and told my guy friend to hurry up and put the boat in reverse before we hit the concrete slab. He made it just in time, but then we were stuck in a tunnel type of area with the water rising by the minute. Meanwhile the other four aboard kept on partying and acting as if they did not know anything was going on.