In Viking Chapter 2.4 - Up The Beach, after climbing the wall using a rope and getting the objective 'Open the Fortress gate', you will encounter a group of guards that will retreat through a small green gate with spikes on it and close it. You will then have to fight a small group of enemies before proceeding. Once you kill these guards, go up the small set of stairs to the right of the gate that the guards closed, and you will see two fire pits on top of pillars with a high ledge in between them. Remain here and two guards will continuously respawn from the door straight ahead of you in the back. Throw 50 off the ledge for Long Way Down. Then proceed forward slightly and you will see a catapult on the left hand side which is the first observable of the level. In front of it will be fire. Throw the same two respawning guards in the fire until you get Anything Can Be A Weapon. While doing this the guards stopped spawning one time for me so i simply reset the level and continued.