Meh...I still think this guy's playing us.

What "straight A college student" jumps off buildings to relax, and can't write a complete, coherent sentence?

Sorry, somebody had to say it.

Better:

Parkour is both an art and a philosophy. It involves overcoming many obstacles: be they in school, on the street, or in life. I feel it has helped me to improve my grades due to my increased focus and discipline. In fact, I'm now a straight A college student!
Generally, parkour is non-competitive and doesn't involve tricks, flips, etc. which provide little meaningful substance to the art. In lieu of these stunts, I channel my attention and focus to primarily rolling off buildings.
Some of my neighbors filed a complaint against me, but the police didn't seem too concerned - in fact, they seemed a bit jealous! But in the end, I realized they needed to uphold the law. However, the punishment didn't seem to fit the crime - I recieved a rather large fine for this transgression, but just a few years ago, I recieved a smaller fine for something which I consider a more egregious violation.
I sincerely hope this event doesn't hinder my goal of becoming an airline pilot.