sorry about that anon
I suspect it was actually that you weren't bracing your arms or shifting your weight backwards.
That's why most people go OTB.
If you actually brakes hard enough, at speed, to lift your rear wheel, most people would let off the brake. I've done it a few times. I guess that one is just instinct/reactions. You could train it though.
Rear brake is going to do fuck all in an emergency brake situation.