Physics textbooks: bringing students to tears since forever. But the real MVP here is Roger Freedman, co-author of that infamous torture device disguised as educational material, who's out here turning Twitter into his personal office hours.
When someone uses his physics textbook to press tofu (the ultimate academic dishonor), Freedman doesn't get mad—he gets technical. "Actually, you're applying a normal force (Chapter 4) and increasing bulk stress (Chapter 11)." That's not just a comeback, that's a full academic citation in the wild!
This is what happens when physicists use social media. They can't help themselves. Everything is a teaching moment, even your dinner prep.