How old is too old?

I'm on the train home. It's late and the train is only half full. Or half empty, depending on your perspective.

Across from me is a kid on the phone to his mate. He's hard to age - he's in clothes that would suit a teenager but I'd guess he's in his twenties.

The conversation is about a job interview tomorrow. He don't want to work for no serious city dudes, bro. (He's white, but has been taking style tips from P Diddy).

He's just told his friend that he job he really wants ... the very career that his heart desires, is to be a ninja.

All I can think is, "you'll never make a ninja if you can't work out which way your baseball cap goes on."

The moral if the story: there comes a point in your life when you are too darned old to think that being a ninja is a viable career option.