Well, from what I could see he definitely wasn't going fast enough to have thrown the car off balance by tapping the brake mid-corner. My guess is gravel or lose dirt on the road. He goes into the ditch, but you can see that there is already some sort of debris in the road before the car flips around in the ditch....
You can see the chasing car jerking back and forth in the same spot where the ST lost traction as well.
2011 SES 5spd #006 >> SR #213
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