#1 - Will kept insisting to be proper and polite with Elizabeth. And she wanted to be more intimiate friends than he was allowing. He missed that opportune moment alrighty.
#2 - Will missed the opportune moment to Kiss Elizabeth below the ship after he had rescued her.
#3 - Elizabeth used the opportune moment on the Island with Jack to get him drunk enough to build the fire which would send smokes signals in the air to call for help.
#4 - Will used the opportune moment to save Jack from death at the end. Man was that a great scene!!
#5 - Elizabeth used the opportune moment to pretend to faint to call intention to herself, giving will more time to free Jack.
#6 - After Captain Jack Sparrow defeated Captain Barbossa, Will and Elizabeth get a chance to talk when Will tells her that her fiance will be happy she is ok and she should go back to the ship. Instead of saying more, he lets Elizabeth walk off. Captain Jack points out to Will that that was an Opportune Moment for him.
#7 -The gold coin waited until the opportune moment to send out a signal to the Black Pearl (when Elizabeth fell into the water).
#8 -Will waited for the opportune moment to throw the sword so Jack had something to stand on when they tried to hang him.
#9 -Jack and Will waited for the opportune moment to steal the Intercepter right out from under their noses.
#10 -The guy that tried to swing back onto the Intercepter didn't wait for the opportune moment and fell into the water.
#11 -Jack waited for the opportune moment to steal a piece of the Aztec gold.
#12 -Will takes the oppertune moment to knock Jack unconsious so he can save Elizabeth.
#13 -Will missed the opportune moment every day since he'd met Elizabeth to tell her 'I love you.
#14 -Will waited for the opportune moment to spill his blood on an Aztec gold coin, so that the curse would be lifted and the cursed pirates who were supposed to die, did.
#15 -The drunken Blacksmith awoke at the opportune moment to assist in the capture of Jack Sparrow.
#16 -Jack tells Barbossa to wait for the oppertune moment to kill Will, so his pirates wouldn't get hurt fighting the british soldiers.
#17 -Jack used the opportune moment to stab Barbossa, so that when Will dropped the gold, Barbossa would die.
#18 -Pintel used and missed the opportune moment to say Parley, therefore, helping Jack, but making Ragetti and the other pirates angry....