When:

You're driving/racing/drifting like a pro, even as you've never raced a real car.

You're going to drift in real life, but first you place the front of your car into a wall and floor it.

You crash into someone in real life and looks for the "Sorry!" macro key.

The clutch on your car is worn out and you wonder why it's still bad when you've let it cool overnight.

You're in a car in real life and you suddenly notice how much viewing angle you have, and you're like "Wow!". (Me not too long ago)

You know you are a LFS Fanatic when you are noob, you stop being a noob and be alien instead. true story.