See Tridork, you live in NZ. People who live in flat places where it doesn't rain (or they cancel/wimp-out when it does) don't get to enjoy these near-death-experiences.

Edit: I live in Victoria, Australia, where it's mostly dry and very flat. I still want discs so I can stay safe when some oblivious driver decides to stop or pull out suddenly in front of me when training. Locking the wheel and flying over the front is something I'd like to avoid doing again.

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'It never gets easier, you just get crazier.'