Shed a tear. Finish this sentence: "I'll know I've finally gotten old when I _____!"?

This is a reflection/humor question about ourselves, not what we observe in other people.

Myself? I love to drive like a bat-outta-hell and have cretain stretches of road where I can safely indulge (low traffic, high visibility and decent blacktop. Knowing that it burns fuel and rubber, I like to jack-rabbit start. Passing is a thrill. So, my answer is:

“I’ll know I’ve finally gotten old when I never push my car past ‘put’”.