You can play the Burger Smash Challenge game (scroll down the page until you see the game) – you will just need to click on the burgers 3 times to smash them. After the game you will get a Buy One Get One Free Smashburger coupon!
I’m not sure what was wrong with my mouse (or smashing skills) but I only got 3! LOL 
Thanks, Tip Resource
How fun….