Transparent Screens - a photoset on Flickr - [Stumbles via StumbleUpon]

Ok, they aren't really transparent but the effect is pretty cool.

Echopraxia (bouncing ping pong ball) - [Stumbles via StumbleUpon]

Weird. So weird that I had to look up what echopraxia is.

[wiki] Echopraxia is the involuntary repetition or imitation of the observed movements of another. Even though it is considered a tic, it is a behaviour characteristic of some people with autism, Tourette syndrome, schizophrenia (especially catatonic schizophrenia), some forms of clinical depression and some other neurological disorders.

And now I'm even more confused.

PV3D Depth of Field - Test 5 - [Stumbles via StumbleUpon]

Trippy.