Sentence:  Weird as it sounds, it was because you weren't going fast enough :-) I've found that if you wick it up too much exiting a curve you tend to do one of those feet off the pegs numbers. Fun, huh? Otoh, if you carry more corner speed the back is more likely to let go gradually, because the tyre is already closer to the edge, so it doesn't require a fist full of <WSD>neddies</WSD> to break it loose. I still wouldn't recommmend it for the road... 
Meaning of the word marked with <WSD> tags:  Horsepower.