Busch Gardens released theirtoday via twitter around 11 a.m. this morning-unfortunately they sold out extremely quickly!
Good new is that they will be doing the same promotion next week. My advice to you is to follow themso you can know when it will happen again! I will of course let you know as soon but I would still follow them yourself.
The code for the discount today was BGVACT, so it may or may not be the same next week.