[beefhash]

Seems to be Warner Losh[1], previously one of the FreeBSD core team members[2].

[1] https://marc.info/?l=openbsd-misc&m=152883510311011&w=2

[2] https://wiki.freebsd.org/WarnerLosh

[anon56774848483]

I was in the room at the time. Warner had the initial outburst. There is a second speaker, and you can hear the voice change, responsible for the profanity. Warner's delivery was much scarier in person though.