An Opened Can of Whoop Gnash

You get this quest from Gnash's Head which is dropped from Gnash (obvious), but it won't drop unless you've completed "Ain't Too Proud to Beg" quest frist.

Doesn`t seem to count towards [Sinking into Vashj'ir] achievement. Completed the zone at 145/160 when I realized I forgot to kill this brute. Went back, and killed him, yet still at 145/160 (A)

The Distant Island Quest Tree From Whiterock
Give + to 12/07/2010 darkbane aswell.
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1)A Personal Summons{H}
 |                    \
1)Eye of the Storm(A) 1)The Eye of the Storm(H)
 ├─────────────────────┘
 |
G)To the Depths{H} S)Hero's Call: Vashj'ir!(A) S)Warchief's Command: Vashj'ir!(H)
 |  ┌───────────────┴───────────────────────────┘
 |OR|
1)Call of Duty{H}──>2)Once More, With Eeling
2)Sea Legs{H}
2)Pay It Forward{H}
2)Rest For the Weary{H}
 |                    \
2)Buy Us Some Time{H} 2)Traveling on Our Stomachs{H}
 ├─────────────────────┼──┬────────────┐
2)Girding Our Loins(H) | 2)To Arms!(A) |
 ├>G)Pay Attention!(H) |  |            |
 |                  |OR|  | 2)Stormwind Elite Aquatic and Land Forces(A)
 |      2)Helm's Deep(H)  └───┤
 |      2)Finders, Keepers(H) |
 |      /                     |
2)Bring It On!(H)       2)On Our Own Terms(A)
2)Blood and Thunder!(H) 2)All or Nothing(A)
 ├──┬────────────────────┘
 | 3)Better Late Than Dead  3)Kliklak's  Craw
 | 3)The Abyssal Ride
 | G)Good Deed Left Undone  3)The Horde's Hoard
 |OR|
3)Gimme Shelter!────────>3)A Case of Crabs
3)Ain't Too Proud to Beg
 ├>3)A Girl's Best Friend
 ├>3)A Taste For Tail
 ├>3)An Opened Can of Whoop Gnash
 |
3)Can't Start a Fire Without a Spark──>3)Nerve Tonic
 ├>4)Oh, the Insanity!
 | 5)Dah, Nunt... Dah, Nunt...  4)Blackfin's Booty
 | 5)Shark Weak
 | 5)DUN-dun-DUN-dun-DUN-dun
 | 4)A Bone to Pick
 | 5)Decisions, Decisions
 | 
3)Ophidophobia──>4)Lady La-La's Medallion
3)A Desperate Plea
3)Undersea Sanctuary
6)Spelunking{H}
6)Debriefing{H}
6)Wake of Destruction─────┬>6)Decompression{H}
6)Come Hell of High Water ├>6)What? What? In My Gut...?{H}
6)The Warden's Time       └>6)How Disarming
7)Across the Great Divide
7)The Looming Threat
7)Backed Into a Corner
7)Rundown            ┌>9)Slippery Threat
8)Silver Tide Hollow─┼>9)Don't be Shellfish
9)The Great Sambino  └>8)A Distracting Scent
9)Undersea Inflation
9)Totem Modification  9)Crabby Patrons
8)Back In One Piece
G)Toshe's Vengeance──>Vengeful Heart*
Quest zones:
1)Orgrimmar+Stormwind_____2)Legion's Fate+Seafarer's Tomb_____3)Shallow's End+Smuggler's Hole_____4)Gurboggle's Ledge_____5)Skeletal Reef_____6)Deepmist Grotto+The Clutch_____7)Damplight Chamber+Shimmering Grotto_____8)Silver Tide Hollow_____9)Silver Tide Trench
G)Gluing Separate Questlines_____S)Skippable
* is another Quest Tree.

IMPORTANT INFO:

1. 
   
2. In order to getPay Attention! you must completeGirding Our Loins before acceptingHelm's Deep.
3. 
   
4. Better Late Than Dead andThe Abyssal Ride are NOT needed to takeGimme Shelter! and followups, however that would make you unable to getGood Deed Left Undone.
5. 
   
6. [item=55186] have 0% drop chance beforeOphidophobia done and 100% after, however anyone can share you this quest as long as you are 80+lvl.
7. 
   
8. Anyone can takeVengeful Heart and do it's followups as long as they are 80+lvl. Quests above are NOT needed for it.

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