I had an odd but interesting dream last night.
It started out with me someplace in the desert Southwest, maybe Arizona or New Mexico, dinking around with a bunch of salvaged/surplus hardware and stuff I'd built myself, and, well, basically I built an energy cannon. I don't know how it worked, but it was hot enough that it fused sand under the beam into glass, and it left some nice puddles of molten rock at the base of a mesa a mile or so downrange. I test-fired the thing a couple times, then figured I ought to shut it down before I attracted too much attention or started a brush fire or something.
Next thing I know, I'm being woken up at oh-dark-thirty by a Secret Service protection detail toting M16s, they've set up a defensive perimeter,¹ and they're saying "Sorry to wake you in the middle of the night, sir, we have to move you to a safe location NOW. We're not the only ones who figured out what you built yesterday and tracked you down, and there's unwelcome company incoming."
 Minor edit since it seems it needed clarifying that the M16s were pointed outwards...