In Memento (2000), Burt speaks to Leonard:
That's the thing. I have this condition.
BURT Condition?
LEONARD I have no memory.
BURT Amnesia?
LEONARD No. It's different. I have no short-term memory. I know who I am and all about myself, but since my injury I can't make any new memories. Everything fades. If we talk for too long, I'll forget how we started. I don't know if we've ever met before, and the next time I see you I won't remember this conversation. So if I seem strange or rude, that's probably...
He notices that Burt is staring at him as if he were an exotic insect.
LEONARD (cont'd) I've told you this before, haven't I?
BURT (nods) I don't mean to mess with you. It's just so weird. You don't remember me at all, and we talked a bunch of times.
Leonard shrugs.
BURT (cont'd) What's the last thing you remember?
Leonard looks through Burt, thinking.
LEONARD My wife.
BURT (fascinated) What's it like?
LEONARD Like waking. Like you always just woke up.
What does "it" in "What's it like" refer to?