Boss: Can you interview someone at 3pm
Me: Sure.
(Me: looks at watch)
Me: That's in 3 minutes.
Boss: Yer he's waiting in reception can you get him.
Me: -_-

Had the same happen to me like 3 months ago... Although it was a 15 min advance warning I received...

Bad news was that it was supposed to be a technical interview, but I did not know from the report what role... Back-end, frontend, sys admin...

Haha :)

To be fair, he told you the time beforehand

I have been on one of those interviews ... :/