Bionic Commando

Challenge: Defeat the 'Mohole'.
Method: The 'Mohole' is a long worm-esc creature. In order to defeat it you must wait for it to charge its attack. While doing so, it's 'eye' will become vulnunerable to damage, simply attack with a weapon or throw a car at it to damage it.

Once damaged enough, the 'Mohole' will fall over and begin to regenerate health. While down, attach to its 'eye' and a small mini game will proceed requiring you to use a 'DFA' attack combined with adrenaline ( + ).

Next repeat as before except this time the 'Mohole' will stand straight into the air and charge for a radial attack. You'll need to time your jumps in order to avoid the radial attacks that come in waves of 3 or 4 consecutively.