The one that sticks with me was the demo to the engineering team of "Aqua". A small team had been developing the new "lickable" user interface that was called Aqua. Before the release of OS X with the new UI, Jobs assembled the engineers that worked on the OS that would be tasked with carrying the UI throughout with their frameworks/apps.

In typical Steve fashion he had a slide-preso for the reveal. He began with a kind of simplified history of the computer user-interface: starting with the command-line. His next slide showed the graphical user interface popularized, surprise, by his earlier Apple Macintosh.

The NeXt slide (ha ha) showed, perhaps unsurprisingly, the NeXT user interface. A "boo" from one of the engineers in the crowd.

Jobs froze and the showman tone of his voice was gone, "Who said that? Who booed?" He was clearly enraged. He stared into the audience, scanning the faces of the engineers. I think he followed that with some expletives and a claim that the NeXT UI was an amazing step in UI design but I was still kind of in shock myself.