I'm loving this Youtube 3D it's so sick. So trippy.. lool.

http://www.youtube.com/watch?v=0GcLW0g_c1s&fmt=22

Set it to cross eye. It's much clearer then 3D glasses. You just overlay the two images.. so you'll see 3 boxes.. watch the middle and its 3D. If its blurry, then you're crossing too hard.