"At least it's not faked" was my main reaction, too. Some other big-tech AI-related demos the last couple years have been caught being faked.

Zuckerberg handling it reasonably well was nice.

(Though the tone at the end of "we'll go check out what he made later" sounded dismissive. The blame-free post-mortem will include each of the personnel involved in the failure, in a series of one-on-one MMA sparring rounds. "I'm up there, launching a milestone in a trillion-dollar strategic push, and you left me @#$*&^ my @#*$&^@#( like a #@&#^@! I'll show you post-mortem!")