This only aplies to Arms specced Warriors with Second Wind (Generates 20 rage and 10% of your total HP when struck by any stunning/immoblizing effects). In Silithus there are these giant worms, called Dredge Crushers there (Thottbot World of Warcraft: Creature: Dredge Crusher), These huge worms Stun you for 1 second every 10 seconds or so. Since there are so many of these worms in silithus, practically half of silithus, you can pull 2 and be regenerating HP at all times and generating rage, making it very very easy to kill them because you have loads of rage and you will never have to eat again. These worms also drop a variety of blues and including an epic called Stockade Pauldrons which you guys most likely heard/seen, you can see them listed in the thottbot drops ( i got the stockade pauldrons on like my 5th kill, insanly lucky). After the patch it is probebly just as fast to quest but there are several of those people like me who would rather grind and earn the extra gold. Lucky for me i got a few other blues including the stockade pualdrons(epic 50s shoulders) after an hour of grinding and rounded up a few houndred gold. Also this potentially could be a decent spot to glide as a warrior.