I dreamed I was at a Boy Scout camp, in a cabin waiting for a troop to arrive for a slide show I was putting on (for some kind of Space Knowledge merit badge.) Suddenly there was a BOOM, and I went blind, feeling my way around the room past the desks and through the door, I could hear the voices of the scouts calling out to me, guiding me to them (so they could see, I guess). I regained my vision out in the open, and I saw that knife-shaped spaceships were cruising slowly and silently through the sky, and people - including some scouts - were suddenly drifting into the air. I remember two boys held on to each other when they were floating, and caught themselves in some phone lines (not live electrical wires, nobody got cooked.)
Then I saw a Scoutmaster yelling at this thing that looked like a 12-foot-long, very thin cannon on two small wheels. It muttered something in English, then promptly turned and blasted him away into the distance (force beam?). I said something to it along the lines of "I find you fascinating, please explain what you are doing." and it replied "did you not learn from the lesson of the other?" so I said "fine, if you don't want to talk to me I will respect your wishes..." it started to roll away. "...but now I'm just going to kill you." Then I reached out my hand and closed it, imagining the cannon-thing being crushed between my fingers, and it folded in on itself like it was made of nothing more than paper. Then I woke up.