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You glue your eyes to your cell phone screen like it's the last thing you'll ever see and march firmly onward.

A shiver runs up your spine as someone taps you on the shoulder.

You've been caught like the antisocial rat you are.

WHAT DO YOU DO?

1. Give up the beautiful dream of a silent commute and engage in conversation.

2. Silently stare him in the eyes until he goes away.

3. Turn and run in the other direction.