How Do You Know When You're Getting Old?

How do I know I'm getting old? When I talk about things I did or witnessed from decades back, realize many here weren't even born when they happened, and have no real clue as to what I'm talking about. That, and having to wear sunglasses due to reflections off the top of my head when "combing my hair."

 

I was sitting down the other day and I pulled a muscle.. like the ones in my thighs. I was like wtf??? I didn't even do anything! Am I getting old or am I just really out of shape?

Also I watched The Mighty Morphing Power Rangers movie again. WTF was I thinking as a kid?!?!?! That movie AND show were utter garbage!!!

 

Yeah, but Amy Jo Johnson was totally hot.