This week on Chirping Zebras, we’re goin’ behind the glass AND behind the ropes with the absolute OGs of Boston Garden security — JACK & JIM McCorkle, the twin towers of TD Garden event ops. These guys have seen it all: from drunken brawls in the loge to backstage mayhem with rockstars, rats, and rowdy fans. We talk Garden history, what it takes to run point on security when the B’s are buzzing or the Celtics are in a Game 7, the wildest things they’ve ever seen go down in the bowels of the arena and how they’ve managed to keep peace with 20,000 fired-up Massholes screaming in their ears.