Full Body Angiography
This one probably has the best effect when worn under a jacket. It is a full-body angiography, thus showing all the blood valves in a body, displayed at the right position where the T-Shirt would lie on your body. Definitely makes for some good shock value 😉
Admittedly the picture quality is quite crappy, which has to do with me not being able to find a better full body angiography. So if anyone has access to one (or found one somewhere) and would like to share, please leave a comment below. Also I might try to do some drawings myself, though I feel this might be quite a tough one.
edit: sorry, I had to remove the picture because of copyright woes.