Blakes password

I am supposed to be managing Blakes facebook while he's gone. I wanted to update his status with his new address but I can't remember the password. I think it's the same as his password for his gmail account, so I did the gmail password retriever to see if I could figure it out. This was his security question:

If aliens are invading your backyard how many pancakes can you fit in your doghouse??

Needless to say I didn't know the answer. Does anyone else happen to know the answer?