A North Face pop-up store in South Korea just did something crazy. They removed the floor which unsuspecting customers were standing on, forcing them to grab on to the walls. The walls, so happened to have rock-climbing holds attached to them.
When the floor started to move, it obviously startled shoppers.

This was the common response.

But then they held on to the walls.

The floor is completely gone. If they let go, they'd fall..into something soft of course.

Then a jacket came down from the top, and a message to jump and grab it in 30 seconds appears.

Watch the ad here: