A lot of people, more than there should be, run the air conditioner in their car full blast but leave the windows open.
For years, I've been confused by this behavior. But last week, I reaped the benefits.
Biking down the street on a recent 90-degree day, I stopped at a light. As I was wiping my sweaty brow, a car pulled up with its windows open, blowing its arctic cold air on me.
The light turned green a moment later, but it was just the break I needed.