Don't do that just about sums it up. It really is all about don't lock that front wheel. THANKS for the pics. Like Luke, I love to see the gore.

8)
Despite the fact that front braking works best, I try to set up brakes so that at least, the front brake never locks up first. Secondly, use your brakes like there will always be gravel. In my desert climate, there always is some sand at least. In a panic situation, I grab only rear brake, and if it locks I steer that skid to thread the needle. Can't steer a front wheel skid one bit, but I can zig zag all over with a locked rear tire. Given a few more milliseconds of time, I'll gently grab front brake. Once you know you don't have the stopping distance, lengthening the stopping distance by not using the front brake becomes meaningless. Preserving control is your last chance.
Once you do lock the front wheel, you likely are hosed. Getting back off the front brake might get you traction and steering again, but chances are about 99% that you don't have that kind of time left before impact, laydown, or over the top. If you have a bit of time and distance, then get on both brakes for sure, but as the distance gets short, get off the front brake and start steering the skid.
For others reading, I also ride nearly naked in the hot months. T shirt, shorts, tennis shoes, helmet that won't do much, no gloves. It's just so hot to wear much more. But ONE TIME, laying down a motorcycle while wearing flip flops was the very last sandal ride for me. In a good laydown though, tennis shoes won't do much more than the decorative biking helmet. No freaking way I can stand it to wear boots in summer, so at least sneakers will grind a bit longer before I grind meat. I'll already be losing palms, knees and elbows, and perhaps chin, teeth, etc.