What, you're surprised this robot can fold a paper airplane? I'll have you know that this is the very same robot that regularly performs prostate surgery. On humans, yes. But there's a small (very small) twist at the end of this video—keep watching, yes keep watching... [TechFlash via CrunchGear]
And then there is Intracytoplasmic sperm injection or ICSI, for in vitro fertilization. That needle is actually an ordinary glass tube. Anyone can make one, if you heat and draw a glass tube over an alcohol flame you can draw it out as much as you like and the hollow inner space will remain, break off and you have your microscopic syringe.
Then you are ready for some hot in vitro action.