Remember the good old days of DOS, when you could open command.com with a simple text editor and find the line with the dreaded "Abort, Retry, Fail" message.
Unwary users were so supprised to see "You're F!*%ed" or some such. And no ammount of rebooting would solve the problem.
When I go to a conference and see bobble-headed enthusiasts wearing some kind of virtual reality goggles, spinning around in chairs, craning their necks to see some distant corner of a virtual world – I’m both completely disinterested and oddly intrigued.