There are some things that have happened in real life which, had you told someone not that far in the past, they would find it incredible. And I mean “incredible” in the literal sense – – not credible – – impossible – – beyond belief. Not simply “gosh, gee whiz.”
For instance, teleport yourself back to the sprawling Sun Microsystems campus in the summer of 2000. Announce to the thousands of Sun employees gathered around you that a high school kid is going to write a web site, and the company based around that web site will become much, much larger than Sun Microsystems. Also mention to them that their organization won’t even exist in a few years, and the high schooler’s company will occupy not only their entire campus, but will need to build an entire city next to that complex to support all its employees.