The off button. Not everyone has one. You know the guy standing beside Regents Park only in his socks and underwear in winter, ok that kind of guy, they're lit up from every light possible.
No, only some of us have that off button.
That button that enables you to enter another frame of mind at the same time in real time.
You are there and dealing with the psychological blow one after another, people wonder how you are left standing.
But that little off button that helps you keep your sanity.
The one that tells 120mph on the wrong side of the road at 3am is acceptable. But also enables you for occasions and life changing situations to operate on auto-pilot. All anyone will ever see are the smiles.
The off button.
Really can't think of another word more appropriate.