Two people One Being level 50
A campaign on Second Play through
The mission "You are cordially invited"

You will be farming the sub-boss "Flesh Stick"
in order to do this as fast as possible stand in front of the hut he comes out of, and kill him over and over A.K.A farm.

It's important that the level 50 get's over to the "fleshstick" area as fast as possible and clears the mobs out.

While this is being done the low level will make his way to "Tiny Tinna"

After clearing all the mobs, the level 50 will continue to kill "Fleshstick" Over and over.

While the 50 is standing there the low level will take the quest after each kill. Thus respawning "Flesh Stick" multiple times.

If you take the quest to fast, the game will glitch out and he will dissapear, the fastest way to do the glitch is to take the quest after the XP has shown up and hit the blue bars towards the bottom.

Also note, the boddies piling up, will cause massive lag so it's safe to say after 100 kills save and quit and re-set up. my friends and mine xbox both froze the other night.

Notice The video Is not mine, It is just a fairly good video on how to use the exploit.