Had what seemed like an elaborate dream about the last Avengers movie. It was reaching the climax of the movie, or maybe a false climax just before it. The villain had surprised our protagonists with a nest of robotic wasps, but 'underrated sword guy' (Inigo Montoya in a tight-fitting outfit) saved the day by chopping it down.

...somasomething about the Obamas.

...and then we fell down a vertical tunnel, surrounded by waterfalls. The bottom opened up into a canyon or something. I was able to control my fall and went sideways into a cave behind the waterfall to join a bunch of people about to have a meeting. It was an SA branch from another city. Maybe Minneapolis. And then we were in a different cave on the other side of the waterfall canyon, and it had a lower part that was flooded. I pushed a glass jar full of air under the water to see what would happen. It broke. And later someone who'd been diving came up and was like "look at these fragments of glass jar I found". It was added to their found-treasure list.

I woke up wondering "Didn't Steve" (Captain America) "miss his friends?" (after going back in time and staying there).