There's nothing worse than the smell of a fresh cigarette stub on Muni (aside from the less frequent bodily functions or a burrito in the process of being eaten).

We have to admit to pocketing our half-smoked cigs on a few occasions when we first moved here several years ago and still smoked. So, we're sorry to our fellow riders who had to endure the odor. You know how Murphy's Law goes when waiting for the bus, "Light up a cigarette, and the bus will come." And it's a shame to throw it out half-smoked. We did find it easy to quit smoking in San Francisco though, BTW.