Board Thread:General Discussion/@comment-7264949-20160604155808/@comment-35009754-20160606205759

Here's my thought on it. Mordecai and rigby film a prank on muscle man or benson, and rigby says. "Hey benson/muscle man, I found something in today." Benson replies saying what, rigby then says "Deez keys" and they're be sons keys. Just a speculation