You chase after it and find yourself in a strange and empty world.

FORBES: Review: 'The Unfinished Swan' Is a Splash of Brilliance That Soon Fades

If you can, keep one more for yourself, and leave it empty.

FORBES: Among Max Levchin's Lessons Learned As A Young Entrepreneur, Which Are The Greatest?

In particular, only 14% of seats on average are expected to be empty on US flights over the next few weeks, so if you do find yourself stranded, it may be even harder than usual to get re-booked on a new flight.

BBC: Pocket-sized guides to flyer��s rights