(quote attributed to mark twain with a picture of einstein) Try learning, it sounds like it would be a first for you. (Link to oobleck video)
@Amplify You appear to have a huge misunderstanding regarding non-newtonian fluids (which btw, this clearly isn't. Mud is not a non-newtonian fluid). While its 'commonly said' that "the harder you punch, the harder the fluid becomes", this is somewhat of a misleading phrase. Laymen tend to consider hardness as inability to break (which it definitely isnt), so they equate the sentence to the fluid becoming more indestructible the harder you hit. You can absolutely hit hard enough to break it apart, and you will easily find videos of exactly this if you search for videos where people shoot a oobleck.
So I guess you have to turn your hostile comment back on yourself; When you have enough force to punch clean through a meter thick wall of stone, you have enough force to do the same for a decimeter of oobleck (despite the mud not being oobleck, your aggression seems to be based under the presumption that it is). Or to borrow your language - Next time, try not being wrong, etc.
Besides all that, I hate that quote you used, even if it had been used correctly (and its not only about his word-choice of "stupid"). It is most definitely always better to open your mouth and display your ignorance, as that is exactly how you can be given a chance to learn. People won't teach you if they don't know you need it, and there is absolutely no shame in not knowing. To continue your tradition of linking external sources:
https://xkcd.com/1053/
So don't use that quote again, even if I know it tickles all your "Aha, I got to insult him!" bones. It trains them to not ask next time.
Oh, and try to not be hostile for no reason.
ps: yes, I know that picture is mark twain and not einstein. Don't ruin my joke