It doesn't take much to make me dizzy. Just hanging my head upside down behind my chair gives me a mean case of the spins. Another thing that gives me the spins: this CoolHunting gallery of upside down portraits:
Photographer Brandon Vogues came up with a simple and surprisingly novel idea: photograph portraits of people hanging upside down by their ankles. Then invite your closest friends to do the same. The resulting eerie series "Upside Downey Face" is a collection of unsettling, strange images of people flipped the wrong way up.
[Hat Tip: Andrew Sullivan]