Time for a Cool Change

You're in a busy part of town, in your casual wear, walking to your favorite cafe for your afternoon coffee. The sidewalk is stuffed with people, all minding their own business.

And you're walking.. and you're walking.. and the cafe is just around the corner... you're making your way through the sea of people, and when you turn the corner the sidewalk is much more peaceful. You can see the cafe's sign already, and you pick up your pace.

Someone exits the cafe just as you are about to go in. You recognize that man as a regular, and he even recognizes you and smiles. He is walking away now, minding his own business. You observe him for a while, and you notice an oddity: he's wearing his Lacoste shirt inside out.

Remember: this guy is a complete stranger; you only recognize him because he is a regular customer at the cafe. Would you just make your way inside the cafe and hope someone else - preferably him - notice that his shirt is inside out, or do you hurry and save him from possible utter humiliation?