Or: "how to run into the rear of an SUV and have them apologize."
As traffic on Crescent St. was backed up near the Queensboro Bridge, my wife biked pass a parked SUV and smelled weed. When she turned her head to look inside, she ran (at very slow speed) smack into the rear bumper of stopped SUV in traffic.
Even though my wife had read-ended them, the occupants of the hit SUV were extremely apologetic. Strangely so. "We're so sorry!" they said many times. Only then did my wife realized that in fact the cloud of marijuana was coming from the SUV she just ran into.