Rear Tires Suddenly Lock Up Going 65

I did put it in neutral after I came to a stop. I didn't shift into any other gear or neutral while the tires were locked. It all happened so fast that focus was more on controlling the car and safely stopping it.

I'll defiantly keep everyone updated with pictures of the outcome. I'm going to start at the tires and work up the drivetrain from there. Probably gonna yank the axle shafts and pull the third member for a full inspection, I'd like to know the condition of the suregrip anyways. Anything special I need to know about pulling the shafts and third member before I start? Any funny measurements I should take? I have a dial indicator, but not a service manual. If the weather is nice I will start looking things over tomorrow.