Grow/shrink optical illusion

Stare at the center of the below illusion for about a minute. The longer the better. Then look away and watch you world melt!
Press F11 to see the illusion full screen for a stronger effect! (press F11 again to return to normal browser view afterwards)

GROW & SHRINK!

SQUASH H!

GROW!

SHRINK!

THIN FACE!

FAT FACE!

SQUASH V!

MOTOR- WAY!