Well it's your lucky day, I'll show you.
Let your roommate (who so kindly accompanied you) tie the plastic to your back like a McGuyver backpack.
Strike a pose to appease the many passerby who are snickering at you.
Don't stop there, the camera needs to capture your better side. I'm channeling Agnes Dean in this picture. Can you tell I'm "smizing"?
Put on your fiercest game face, and get ready to brave wind and rain, all the while providing comic relief for cute little old men on bicycles who will make comments to you in German.
That wasn't so hard, now was it?