Awkward! How do you react when you see someone you know at the train station?

We've all experienced awkward situations, including the unexpected run-in with an acquaintance when we would rather just keep to ourselves. On Wednesday, TODAY is starting a special series dedicated to all things awkward — and we want to know how you react to more precarious social situations. So tell us, what happens when you unexpectedly find yourself in another's company at the train station?