Cycling on a long solo mission and used to insults and projectiles being hurled at me, I heard a car slow and 'nice number, bro!' shouted at me. I looked quizzically at the man and the saturn and he shouted '420, dude! yeah!' I realized my Lagunitas bike jersey had a mock number tag printer on it with the classic stoner code on it. I threw the horns and continued on my ride, feeling a bit cooler in my spandex.