[antidaily]

six subjects had their rectums filled with a contrast solution and then released the fluid from a squatting or a sitting position while being filmed with X-ray video.

yikes.

[angstrom]

Science!

[trafficlight]

Only if they were wearing lab coats.

[patrickgzill]

Grad students would be my guess...

[pavel_lishin]

Yeah, I think I've seen that one on the porn store rack.