Houdini's Great Escape

We have two "Flemish Giant" rabbits, Houdini and Piper both males....they live together in one cage which sits inside a large chain link fenced in area, every morning my girls run outside for bunny duty (in their mismatched pajamas and rubber boots) to feed and water the bunnies..but more importantly to let them out of their cage and into the fenced in area so the boys can kick up a fuss. Usually the boys are well behaved and the most trouble they get into is when one decides to use the other ones head for a bed or a chair. I have seen the face of an ANGRY bunny and believe me its not pretty!! Occasionally there are the times when Houdini mysteriously manages to lock Piper back in the cage leaving the entire fenced in area to himself, I can usually tell when this has happened because I can hear the fence rattling and shaking and when I run outside to see what the heck is going on , I find Houdini in the middle of a one Bun rabbit race around the fence... grass and dirt flying through the air...thats the worst of the misbehavin'... until today ...when Houdini decided to "channel" the "real" Houdini's spirit and escape the "bunny lock-down" by digging a hole so large even the inmates that escaped Alcatraz would be impressed !! I found him grazing in our lawn near the edge of the clover field behind our house...thank god he had no idea he was standing so close to rabbit heaven...I would never have caught him if he'd wrapped his little bunny lips around his first taste of clover...