I parked in the open-air parking garage on top of Cobo Hall one time in the dead of winter and forgot to turn my headlights off. I worked 8 hours and came back and my battery was dead. My ticket from the parking garage said "ask us about our jump start service!" so I went up to the booth where you pay to park there and asked them about their jump start service and was answered by laughter and something to the effect of "the tickets actually SAY that?!" by the people who worked in there.