Non-Newtonian fluids are liquids that are also sort of solid but also sort of neither but also sort of both? They’re very thick liquids or very giving solids, depending on what you want to call it. That’s why they’re so fun to do science experiments with. The Backyard Scientist went and filled up balloons with non-Newtonian fluids and ripped a chainsaw through them, shot a BB-gun at them, and fired off a golf ball cannon at them too.
He wanted to compare how non-Newtonian fluid would react vs regular ol’ water in the same situation. Let’s just say the non-Newtonian fluid explosions were so much better (and they acted like a solid).