pull an upstream

Also known as "pull an upstream".
Used when referred to an organization or individual abruptly leaving without letting the public know, causing confusion, anger, and tons of lost data.
This referred to "Upstream Sea", a person who ran a Minecraft hosting company called SlothHost, which he left to die out.

Guy 1: Did you see that Tomas disappeared?
Guy 2: Dang, I never knew he'd pull an upstream.