Complete shutdown while driving. ECU-IG fuse blown. Why??

copied from your other thread for future reference:
Ok there is definitely a mechanical link. I put my car in ready and put the parking brake on, put the car in N, pulled my 12v and hybrid plug and the backup brake box harness and was able to roll down my driveway (confirming the car was not in P) and I pumped and stopped about 50 times before I got to the end of my driveway. There is absolutely a mechanical link.