(YouTube Link)
Pranksters Dan Podosek and Yuki Palermo like to pretend to hold a rope across walkways and roadways to see who will stop rather than break the invisible (and non-existent) rope. Here's their Christmas video, shot at a snowy road and a shopping mall. There are more videos at the link.
Link via Urlesque
With the mall it seems most of the shoppers were amused and played along. Looks like these guys had fun!
Causing unnecessary braking on a snowy road probably isn't the best idea, though.
Hilarious.
The honking though is completely unecessary on the driver's part.