Found another method to level up agility kind of quickly. This works best in Old Town as there are many more buildings tall enough for this. Steps: Duplicate yourself a ton of flares (over 500 at least). Become 'seen' by infected. Scale a building that is tall enough to where if a zombie were to fall it would die, but short enough that infected and nighthunters can climb up to you. This works best on buildings that have roofs like this like this: When the infected climb up to you, throw down a flare directly by the point at which they climb on the roof. They will be stunned, and will be standing still with their arms covering their eyes. Simply kick them off the roof. For each one that dies, you will receive 100 agility points. All thank to Retribution for this one.