1. Getting the road all to yourself.
2. Just beating the flashing walk signal.
3. Creating the perfect playlist.
4. When your pump-up song comes on just when you need it most.
5. Reaching the top of a hill you didn't realize was a hill.
6. The blessed downhill.
7. Passing the person ahead of you on the path.
8. Finding earphones that stay in place.
9. Conquering the elements.
Because nothing gets in the way of your runner's high.