When you go over a bump (IRL) and expect to hear the cheesy suspension sounds from BeamNG. When you flip your truck in Spintires and reach for Ctrl (Control) to use the Node Grabber to right it.
When you go to the dealership and ask for a look at the Garvil D-Series. Also, when half of your memory (on computer) is filled with Beamng mods.
When you look at cars and try predict if they were to a crash/ Look at a crash and try to determine what happened based on your knowledge on beamng