Laughter Is Coming In The 'Game Of Thrones' Blooper Reel

A Lannister always cracks us up.

If there's one thing we know about HBO's "Game Of Thrones," its that it's a very serious show. Deaths, anguish, darkness: there's barely ever any light on screen to lift the tension between deadly weddings.

But behind the scenes? The cast, they do have fun, and as a season four blooper reel ably showed off to fans at the show's Hall H panel at San Diego Comic-Con, they also screw up their lines... A lot.

Highlight? The deadly, undead White Walker falling off of his high horse — though Tyrion (Peter Dinklage) and Jaime Lannister (Nikolaj Coster-Waldau) dancing is a very, very close second.

"Game of Thrones" returns next Spring.