Thanks, everyone!
This piece has got quite a reaction considering that it's a pile of junk that took next-to-no-time to build!
I didn't have a plan, other than I was building some sort of flying saucer. I didn't even know I was going to do it as a crash. It just sort of happened. Fast.
As I pulled bits out of my junk box, I realised how I could use them - and the thing took shape before my eyes.
I'm glad I didn't leave it dark grey - I was going to - but that would be too predictable. Instead, it has a bright cartoony feel I rather like.
Now I need some appropriate aliens to stagger from the wreckage...
As to what brought it down, I suspect the only thing on Earth capable of such destruction would be Professor Shandy Tanglefoot's Over-Compensatory Death-Ray of Doom...