Watch this tiny robot crawl through a wet stomach

While this video shows a tiny robot from the City University of Hong Kong doing what amounts to a mitzvah, we can all imagine a future in which this little fellow could stab you in the kishkes.
This wild little robot uses electromagnetic force to swim or flop back and forth to pull itself forward through harsh environments. Researchers can remotely control it from outside of the body.
“Most animals have a leg-length to leg-gap ratio of 2:1 to 1:1. So we decided to create our robot using 1