Fun with guns, you guys! YouTube channel Smarter Every Day put an AK-47 in a fish tank (with no fish) and used a high-speed camera to record the results of what would happen if you fired that gun. What they learned is the AK-47 actually works better underwater, because SCIENCE. More importantly, I've learned that if Water World ever happens I need to get my hands on one of these. You know, right after I grow some gills and shit.