1) The scene in the Season 1 finale, when Sawyer is measuring the new mast for the raft and Jack approaches him to give him the gun and Sawyer goes on to tell Jack how he met his father in Sydney and that he's proud and he loves him.....
2)The scene sawyer kills the real saywer in the black rock

3)season4 when ben is moving the island with the frozen wheel (First time i saw it I nearly cried..poor ben)
4)jacks flashback,when he realises that he fixed sara.....
5)when desmond meets penny at the boat....