one of my friends played warcraft so much that he said he would hear voices as he was drifting off to sleep - "They're destroying our cities!" - and shit like that
and once when his alarm went off he moved his hand across the bed like he was moving a mouse to click it off
when i was a kid i used to have a recurring dream where, in the dream i "woke up" and there was a colecovision waiting for me in the living room, only to actually awaken to the crushing disappointment of reality every time