he was just mumbleing things he said before on the Island, if im not mistakien things he has said to Jack. I thought at the end he remembered Jack because everyone needs someone to help them remember, Hurley/Liz, Charlie/Claire, Dan/Charlotte, Jack/Locke.
He said "Push the button", the button in the hatch that had to be pushed every 108 minutes. And "I wish you had belived me" which is what his suiscide note said. Jack said it to him and it looked like he started to remember, then he left the room.
________ HONDA CB1