OOC: Acrobatic Bluff as a move action at +12 on the Wrecker. Total= 16. He opposes with better of Acrobatics and Sense Motive.
http://invisiblecastle.com/find.py?id=1216480
Then I'll throw the Shield. Power Attack 3, Defensive Attack 2 if Acrobatic Bluff doesn't work. If Acrobatic Bluff works, Power Attack 5 and Defensive Attack 4.
So if Acrobatic Bluff fails, attack at +8 for 9 damage, Capt has 16 Defense.
If Acrobatic Bluff works, attack at +4 for 11 damage (no Dodge bonus and -2 Defense for Wrecker), Capt has 18 Defense.
The die roll is a natural 20!
http://invisiblecastle.com/find.py?id=1216487
So that's definitely a hit and it's either 14 damage if Acrobatic Bluff failed or 16 damage if Acrobatic Bluff succeeded.