OFFTOPIC: when I was little, when I heard the word “game Easter eggs” I thought you hunt for LEGIT Easter eggs..
"BeamNG" "cars handle like they're on ice" Under one of the bridges on West Coast USA. Not sure if this one's been mentioned yet, but I'm pretty sure it counts as an Easter egg. I guess it's referencing the car's handling earlier in development, where bad reviews claimed that the cars handle like they are on ice.