In this meta-heavy installment, we learn that the Winchesters’ legendary survival skills weren't just the result of "training from John Winchester"—they were bolstered by "plot armor" provided by Chuck (God). With Chuck officially done with them, the brothers are downgraded to "normal" humans. The results are both hilarious and humbling:

Supernatural 15x10: "The Heroes’ Journey" — When Plot Armor Finally Fails

burns dinner, gets a common cold, and loses his ability to even trip over his own feet gracefully.