Of course you already carry around a small shard of NGK (日本特殊陶業株式会社 aka Nippon Tokusyu Tōgyō Kabushiki-gaisha) high-temperature spark plug porcelain ceramic insulator to easily break windows, but how do you determine which parked car has worthwhile booty? Simple, just crane your neck and look into each car as you walk down the sidewalk.
You’ll never know what you’ll find.
As seen on Golden Gate Avenue, checking every last car on this block and the next one too:
NB: Don’t try this in the Richmond District, else you might make the Noteworthy Arrests section of the Richmond District Police Community Relations Forum newsletter and then end up in the hoosegow.