Not only should you re-watch The Curse of the Black Pearl, but you should actually pay attention this time. Exactly how long did Bootstrap have to untie himself and walk out of the water? Years!!! I am pretty sure it is completely possible to untie a few knots when you have years to do it. If you paid attention in the first film you will see that cursed pirates can walk under water. So please quit saying that Bootstrap being in the next film is a stupid idea. As for Barbossa, maybe the monkey gave him another coin right before he died. Make sure you watch the scenes after the credits on The Curse of the Black Pearl to see what I mean.