Gaining an unfair advantage in wing-mirror wars.
Those are a thing, right? Wing-mirror wars?
From the submitter:
"The heater in my son-in-law's truck only blew warm air from the dash front vents, so I suggested he go to a home improvement place and buy this flexible hose and tape it in place! This got him through a lot of cold weather, giving him a clear windshield inside without a problem!"