In its 11th hour bid to sign people up for Obamacare, the administration is warning younger Americans that their feeling of invincibility is ending and that, like Superman, they could soon be devastated by “kryptonite,” leaving them broke if they don’t have health insurance.

“When I was in my 20s, I didn’t think I needed health insurance. I was healthy. I felt like I was Superman,” wrote a blogger on the Health and Human Services website Tuesday. “Now that I’m 32, I don’t feel like Superman anymore. I realize that anything can happen to me — or to anyone — at any time. I’m active and like to lift weights, but what if I injured my shoulder? What if I got seriously sick?”