As we all know, growing up is an inevitable part o' life. But sometimes, the realization that you're no longer a kid can hit at the weirdest times and in the most unexpected ways.
Like for me personally, I first realized I was actually an adult when I ran into a girl I hadn't seen since middle school at a bar, and she told me she now worked in sales.
Perhaps you had just gotten unmatched on Tinder(!!!) when your best friend told you they got ENGAGED(!!!!!!!!!!!!), thus sending you into a downward spiral full of EXISTENTIAL CRISES!!!!!!!!!!!!!!!!!
Or maybe you found your mom's old journal from when she was your age, and it FINALLY sunk in that she had a whole other life before having you.

