Ooops!

I promise, this was a surprise (which is what makes it fun).  The result of forgetting what I was doing.   But, these two sisters met 'perfectly' at an unattended crossing that was never meant to have switches set the way they were.  Luckily the speed was slow and it was just a 'bump' and an immediate short circuit.   Somewhere I have a folder of more specular crashes, but I don't consider them anything to be proud of.  It just makes you glad your only playing with "toys".