Blood Sport is the perfect name for am ambitious piece of technology: a rig that will link medical hardware to a video game, and take some of your blood whenever you're hit. All for a good cause, of course.
Despite hospitals and emergency services the world over needing fresh blood every day for transfusions, there are never enough people willing to donate the stuff. Blood Sport is looking to make the act a little more lucrative, linking the charitable aspect (the losing blood part) to some fun (the video game part).
It's really simple: the electrical signal from a controller's rumble is linked to a fairly standard blood collection system. Every time the controller rumbles, some blood is taken from you.
While this might mean it takes a little longer (depending on how good you are at avoiding damage!) to donate the blood, if it means more blood is collected, the longer waits will be worth it.
Blood Sport is currently up on Kickstarter.