A new phenomenon? Probably not, but I saw my first video of a Fast Food Snatch just today.
The concept: Hide near a fast food drive-thru and be ready to sprint when the hand starts passing the fast food out the window to the waiting driver/customer... and grab that bag of food and keep running.
The video I just saw is below, but there are more on Google Video.
Reminder: This is a crime! Don't do it!