Just checking out helmets on ebay and noticed an ad for one said, "This helmet even has a 3D visor come standard!"
Can you imagine the conversation with a salesman in the store?
"Would you like the 3D visor, sir?"
"Ummm - no thanks, 2D is fine - when I ride , I'm interested in height and width, but I don't really have a need to see depth!"
Or maybe the helmet is for middle-aged riders ?-
Dysfunctional, Depressed and Dangerous!!!!!!Jim