This will be the other most difficult achievement aside from completing the game without dying.
This is going to be based on score and time. This will need to be done on NORMAL mode in order to post to the leaderboards and get credit. Use your Pepper and Power Ups where possible. Remember Soda Cans give you speed burst and make you invincible. For higher scores, stun the bad guys with Pepper while they are on part of your burger. This will make it drop by 2. If you have more bad guys on the burger part, it will drop more. (2 guys = 4 drop). Also, you need to avoid dying. Make sure to pick up the letters to spell BURGER where possible as you need the bonus points to 5 star (Thanks to ronron1).