I "woke" up in my dream...

I had a dream, it was a big lake on a gloomy day, in the middle of the lake was a cottage that looked abandoned so i went to it. When i got inside the cabin the whole "island" i was standing on in the middle of this lake began sinking, i remember i got a little panicked and then as the cabin sank i looked outsied and saw huge jellyfishes outside and thats when i got this "ok this must be a dream" because it felt so whacky. I pinched my arm and i started "zooming" out of the dream like i floated away from my "dream self" and everything became black and then BOOM i slowly woke up and felt so relieved. It was so crazy and ive never had that happen since. This is one of 2 dreams i really rememer, just had to let yall know hehe.