It could have went bad!

I'm almost too embarrassed to share this. My FW was brand new and I was in the storage yard trying to back into a narrow space and had the FW in a tight angle to the truck. I apparently had my brake cable hooked up with not enough slack for the tight turn and it unplugged from the trailer. The rig came to an abrupt stop. I quickly jumped out of the truck to see what happened and saw the cable was disconnected. I climbed into the bed and plugged it back in. What I didn't realize was that I didn't put the truck in park when I jumped out - it was still in gear! Next thing I know is the rig is driving itself across the lot with me in the bed. I about broke my neck jumping out the bed and scrambled to the open door to slam on the brakes before it hit a building. OMG was I lucky! I could have hurt myself or got tangled up under the rear wheels of the truck when I flopped out of the bed to the ground. I beat myself up pretty good for being so careless and stupid. The RV god was watching out for me that day. Looking back I should have just unplugged the brake cable and it would have stopped the rig but I was panicked at the time and didn't think of it.