Check this out,
http://youtu.be/bz7hj_YC3j0?t=2m2s
Basically stare into the center of the spiral, for the duration of the clip, then look at the back of your hand and watch your hand and watch your hand expand
If you want to see the complete clip watch this (if not, click the link above)
http://youtu.be/bz7hj_YC3j0?t=2m2s
Basically stare into the center of the spiral, for the duration of the clip, then look at the back of your hand and watch your hand and watch your hand expand

If you want to see the complete clip watch this (if not, click the link above)