In my first game of Mage, I spent a lot of time reading the Wisdom and paradox rules. Wisdom is a function of a Mage's morality and Paradox is what happens when you use obvious magic-bad shit happens as the world goes "NO! NO! NO!" Being a bright eyed idealist, I immediately decided that my Mage payed very close attention to the whole "only use what is necessary" part of magic. I had a car, so I offered to drive everyone everywhere.
Well, another Mage-the DM's own character-decided to ignore that and instead of hitching a ride with me, would teleport everywhere. This came to a head at one point where he teleported, and inflicted Bedlam upon himself because he rolled 2 successes on the Paradox check (This is an odd one-successes are BAD on a Paradox roll). We came back to my Sanctum after a brief investigation, and found him in the fetal position in the corner. I calmly walked over to him and asked what he had learned. "MAGIC IS EVIL!" He screamed out.
Not really a point to it, just a really fun story. Remember people, no Paradoxes!