In WotLK, you can now go buy the mechano-hog bike from dalaran.
Now the exploit is, because it's not a normal mount, like you don't get on it with a puff of smoke, you get on it like a siege weapon, meaning your char jumps on it.
So what you do it, hop on the bike, go up next to a wall/door, make (facing your back) your left side be right up against what your want to jump though, and click the red arrow to dismount. and bam, you'll be on the other side of that wall/door that you can't run though.
Try it out, who knows what you could find behind doors that blizz don't want us to see yet.
Now the exploit is, because it's not a normal mount, like you don't get on it with a puff of smoke, you get on it like a siege weapon, meaning your char jumps on it.
So what you do it, hop on the bike, go up next to a wall/door, make (facing your back) your left side be right up against what your want to jump though, and click the red arrow to dismount. and bam, you'll be on the other side of that wall/door that you can't run though.
Try it out, who knows what you could find behind doors that blizz don't want us to see yet.