So, what happens...? Traffic slows to about 20mph and the new guy in front of me starts smoking a cigar and blowing it out of his open moonroof and/or driver side window. Since we're not going very fast, the clouds are clearly visible and don't dissipate much, and since we're going fast enough, now my car smells like cigar smoke (for a small amount of time, but still.)
So... irony.