Eagle-eyed Game of Thrones fans spot something bizarre in background of Beyond the Wall battle scene

There in the background of all the action and sword-clashing sat a white pickup truck (above).

Yes it's white, but it hasn't quite blended into the background. Maybe it's where the White Walkers were storing their industrial sized chains .

Or maybe it's what the showrunners use to transport all the equipment across Ireland in order to build a very accurate frozen lake and let slip in these behind-the-scenes clips.

Not much gets past beady-eyed Game of Thrones fans.

They can spying throwbacks, clues, references, hidden meanings and, of course, inconsistencies and errors a mile away.

Thanks to the internet, they're quick off the mark pointing these out.