I really wish I'd somehow been able to score one of those Tesla cars for myself right now.
I've just spent about 3 hours stranded because the engine suddenly cut out while I was driving down a 50-limit road in the countryside to go shopping. Once I realised it was off, I tried a couple of restarts while coasting... nothing. I ended up just making it to a somewhat safe spot on the other side of the rail bridge.

The guy from the AA reckons it's probably the fuel pump. So we've left it with my favourite local garage (or, rather, parked outside, since there was obviously no-one in) and I'll be asking them to stop in for the key to find and fix the problem.
At least it didn't happen on Thursday, when I need to drive 100 miles' round trip. Hopefully, fixed in time. Or courtesy car.