This made me laugh....
Okay, I'm going to copy and past exactly what this webiste said.(http://en.wikipedia.org/wiki/Pirates_of_the_Caribbean:_Dead_Man%27s_Chest)
It said...
Another authentic expression is Will's when he witnesses Jack and Elizabeth kissing. This was not put into Orlando Bloom's script so that the look would be real.
That basically means that Orlando Bloom REALLY was suprised when he saw johnny and keira kissing. He never knew about the kiss until the actual shooting of that scene. So his expression was completely real when he saw them kissing. I find that hilarious...I could just imagine what he felt like when he saw that..lol. 😆
Anyway, I'm sorry if this was already posted, but hey - it doesn't hurt to hear it twice.