fascinating

Or it was life

I can dig the "watch out for colliding stars" bit but how can ya watch out for black holes when ya can't even see 'em?

If there's intelligent life out there, we're probably an exhibit in one of its zoos. Ever think of that? Or perhaps we're being farmed for food or lab research without even knowing it. Intelligent life may be to us what we are to a beetle; they might never even dream of trying to communicate with something as primitive as humanity. If life here on Earth is any clue, life "out there" will be brutal, competitive, and hostile. We are idiots to search for it.

hmmm

The only problem with being an exhibit in zoos is knowing you're in a zoo. watching the universe through time, shows that while life may be able to form in many places, at random it can all be gone in a flash.
I wonder if it was the first sign of something that will continue with with more emissions. You can spot a a lot of super massive black holes because there is a galaxy wrapped around them. Maybe two black holes from colliding galaxies were so big they couldn't miss each other. Back then there wasn't nearly as much space in the universe, it would have been much more crowded.