Ok well I dont have a 70 but i was on my feral night elf and i was trying to jump off a waterfall but then i try this and i got no fall damage ok this isnt really a Exploit but here you go and im sorry if this is a repost.
Ok first make sure you go feral if your a Druid and get your talent points all the way to here
Talent Calculator - World of Warcraft
Make sure you are atleast level 30
and for warriors
Charge - Spell - World of Warcraft
It just requires level 4
ok so now when you are on the top of the hill or what ever you are about to jump off make sure there is a enemy you can duel someone and have then go down there or something but just make sure there is a enemy down there
now go ahead and jump but make sure you click on the enemy before you hit the ground use (Charge,Feral Charge Cat, and Feral Charge Bear) and Feral Cats jump right behind Charge Stuns and the Bear Charge has same effect. then because im a night elf i just use shadowmeld to get out of combat but if your a warrior non-Nelf then just i recommend you just fight them and ive done this many times and been successful. good luck trying it
-Cradin