See for yourself:
Could it be? Is Jamba Juice really putting burgers and blenders and serving them up with ketchup and mustard!?!?
No way. They're just trying to make a point... as you'll see when you go to their dedicated website for this video & promotion: cheeseburgerchill.com
Their point is that fast food chains are getting into the smoothie business, but that's not their specialty (like Jamba) and they're not doing as good a job. The implication is that fast food restaurants serving healthy, tasty smoothies makes as much sense as Jamba Juice putting a hamburger in a blender.
Just for receiving their little message, they're offering a coupon for $1 off a smoothie.