How fast were you going on that hoddle street exit!?
I'd agree with SgtBourne. The only way you'd be able to get the brakes that hot is to drive down the eastern freeway with one of the brakes unintentionally engaged.
The last time I saw glowing brake rotors was when I watched bathust last year, similar to this:
http://www.youtube.com/watch?v=lnQZ8tyX0ms