This is also why death doesn't really exist. We will never experience our own death. I think what happens is like when you fall asleep and start dreaming - you don't notice the transition between states of consciousness. Same with waking up from a dream, it wasn't traumatic. And if you didn't dream (like when you have anaesthesia for surgery) it feels like you "blink" and time has passed. The unconsciousness feeling as though it didn't exist. Because for "you" (consciousness, the self) it didn't.