One of the most popular answers was a moment everyone getting old has experience: the first time you look at people in their early 20s and think that they look like high schoolers. It’s especially difficult when it happens in a social setting you used to feel comfortable in. “When I went to a nightclub last weekend and everyone looks like children…” u/TheDeadlySquid wrote in the viral Reddit thread. Another essential rite of passage into geriatric existence is when the pop culture you were raised with is suddenly considered “classic.” Because one day, Arcade Fire is the hippest band around and before you know it, they’re dad rock as hell. How does that happen!? In that vein, one user responded: “When a song I loved as a teenager appeared as an oldie on the radio,” u/LucyVialli explained. We feel you, Lucy. And, of course, there is really nothing that makes you realize you have aged out of your youth more than when your body has turned on you and suddenly just existing is filled with random pain and constant aching. One user, in particular, had a hilariously brutal experience with age affecting their body. “When I dislocated my jaw lying in bed yawning,” u/purpleowlie recalled. “Didn’t even think it was even possible.” Finally, a tough moment of getting old is when you find that people all around you in the grown-up world are actually younger than you. “The first time I was treated by a doctor that was younger than I was at the time,” a user wrote. Ouch!