Has this happened to anyone else?

Have you ever dreamed a phenomenal dungeon?

It's been a day of registering for classes and the like, but I'm still remembering parts of the dream that I had last night and how they would make a great D&D dungeon. The start of the adventure was fairly mundane: I can recall giving the signal to my sister and a couple of my friends on the edge of a baseball field, where we all got into black burglar clothes and started making our way towards something.

Here's where it got pretty crazy. Apparently, the heist that we were meant to pull off was in this crazy dungeonesque castle which was really just a massive manned tank around a gigantic octopus. Like the size of a skyscraper. A series of rope bridges connected different parts of the castle aquarium, including some that went directly over the octopus. I was trying to get into the structure through one of these bridges, but the weight of me and my gear made it sway in the high air, so I had to crawl the rest of the bridge's length on my belly until I reached a small portal where I could enter. Inside, the stone walls were damp and had algae growing on them like the inside of a fish tank.

I really want to expand on this whole idea for a dungeon and hopefully I've gotten enough written down to remember the inspirational aspects of the dream. The thing that really stayed with me was "what happens if that octopus gets mad? Utter chaos, that's what."