Id just like to share my tonight experience with you guys. I was just writing my new flash when my laptop just died in the middle of writing. I was sure for a moment i bricked it. Very stupid mistake it was, battery on my laptop was almost dead and i started flashing without plugging it to AC. Anyway, engine fans went off and it wouldn't connect to ecu after that. My car battery also wasn't greatest so the fans got it down to under 12V and my charger could supply only 4 amps which obviously wasnt enough. For anyone wondering, the relay for the fans is in the engine compartment fuse box, marked wit the big number 100. Unplugged it and the voltage went back up. Thanks to MPPS managed to flash again. All good now. I am a noob and i know it, but that was so stressful for me...
As long as you don't actually try and start the car then a crash half way through will be recoverable. It's when you start it and it fails the bricking will occur. .