You ever wonder why two hours into a flight those Air Jordans you so feverishly laced up outside airport security now feel like they’re being vacuum sealed to your feet? It’s because the pressurized air leads to lower blood pressure, and more blood getting stuck in your cramped feet under the seat in front of you. And while getting up and walking around the plane can help, don’t ever, EVER be that person doing yoga in the aisles.
9. Psychotic disorders
In 2007, the good people at The Lancet published a meta-study (that's a study... OF STUDIES) on aviation and health and found that messing up your sleep cycle and body rhythms on a repeated basis can lead to cognitive decline, sleep disorders, heart disease, cancer, and psychotic and mood disorders. So that guy losing it at the FA because she won’t give him an extra pillow might only be one notch higher on the crazy ladder than the guy who sits outside your 7-11.