Well, I've had the tail end around many times (without the ebrake of course) but it usually involved trail-braking into the corner.. Deep into the brakes with the front suspension fully loaded you ease off the brakes during turn-in.. weight gets transferred back onto the rear wheels, possibly overwhelming their traction and bringing the back-end around. Combine that with a hint of counter-steering just before turning in to get a "swing" into the rear end and you'll be going around rally style at any intersection.
On my car, dropping the throttle mid-corner simply overloads the front suspension and causes the setup to push even more.. Blech..
Maybe that specific curve has a camber change or a downward slope to it? That could explain a lot of things!
