O2 is overrated, unless you have Emphysema or are in less than a 19.5% O2 environment.
You want an energetic rush for a longer duration? Vacation and spend a little time hiking or trail running at an altitude of 9,000'+ above mean sea level for a week, then come back to NOVA and you'll feel like superman for 3 to 5 days.
Forum:
Fairfax County General