Update: There's another one.
Bethesda has released a mysterious six second teaser trailer via Vine that could be for anything except Fallout.
Bethesda's Pete Hines took to Twitter to dispel claims that it must be for Fallout, by tweeting "guess again" in response to a Fallout enquiry.
You've probably already seen the entire clip by now (it will keep looping) so tell us what you think it is. We have no idea...
By Ben Salter