Brush with death

We had a close call today. The Joker managed to capture Robin and me. His goons tied us up and suspended us over a shark-filled tank. He set a timer to lower us into the water after 60 minutes. We were staring death in the face. Then, inexplicably, the Joker and his men all left. Needless to say, escaping was easy at that point. Robin has been known to eat entire sofa cushions and chair legs, so chewing through those ropes was no big deal.