well not sure how many people know this. But I saw this for the first time the other day. I had just rezed as horde in WSG GY and below me down the supposively impassable cliffside in front of the horde graveyard was an allie warrior. I stood at the top thinking he couldn't reach me and I could cast down onto him, when suddenly he charged me.
Not only did he charge me, but he went up the cliff side and landed ontop! I don't know if he was cheating using mountain climber. But from the look of it he used charge to get up and over a cliff side that he wasn't suppose to be able to pass. A very good trick for allie warriors who want yet another easy way to get into the horde WSG base.