When you walk into a McDonalds, drop and handful of bottle caps on the counter, and say "give me a Gecko Steak with a side of Cram, and a Diet Nuka Cola."
When you look out your window and darkness has fallen without you realising
When you look out your window and daylight has arrived *again* without you realizing. "Wait a minute, I thought the sun was in the back of the house..."
Your searching your pip-boy map for megaton and pause for a second in sheer panic, only to realise yeah im ACTUALLY playing new vegas. Also when you realise your talking like benny and the guys from the tops finishing every sentecnce with baby.
When you respond only to "Vault Dweller," "Chosen One," "Lone Wanderer," or "Courier."
I seriously have "Vault Dweller" on my nameplate at work. Even got the boss to get it embossed on the actual plate instead of hand written. You should people's faces when they come over to my desk
When you sit on fallout for a whole day and think it's the same day, E.G It's Thursday, it then turns to Friday night but you still think it's Thursday night.