Smoke/steam/toxic waste byproducts coming out of a stack/tower/chimney/vent pipe.
GRAB: Vent pipe with steam.
Had a heck of a time with the low clouds, rain and overcast getting contrast to show steam or smoke. Didn't help that it's 53F today, so not really cold enough to show hot gasses well. Not a problem for you Eastern guys right now.
Another pic, chimney with smoke.
TAG: Your motorcycle and a non-chain Pizza place.