Stupid Question of the Week: Summary Backstage?

so, I bought the Johnny's Summary DVD at the Tower Records (dude, stfu, TINY Y3!) but Summary Backstage does not seem to exist.

Is there a special edition of this or something? I googled and yesasiaed it, and it doesn't seem like there is, and nobody makes any mention of having a second disc (mine only has 1).

Am I a complete retard? Where does the Summary Backstage come from?