This is a video of a mantis shrimp, presumably very angry it was yanked up from Bikini Bottom, punching the fisherman who caught it, slicing through his new bootie and foot and causing him to bleed. The dude sounds pretty upset about the booties, which he repeatedly mentions are new
This is a video demonstration of an angle grinder attempting to cut through Proteus, a new material developed by researchers in Germany and the U.K. that prevents itself from being cut by using the vibrations of embedded ceramic microspheres to cause damage to the cutting tool (full paper HERE). Some