The clip goes by really fast with a lot of quick cuts, so you might miss Grendel's mother telling Beowulf she could give him a son -- say what?! Are they suggesting that Grendel is Beowulf's son? Or that she's going to give Grendel a brother?
I would say the trailer was met with stunned silence, but that so quickly turned to laughter it's hard to make an argument for that. In the film class, I tagged the images as we saw them ("um...frozen ship, uh...bridge of fire...") which only made us laugh more. One student argued in favor of the success of computer enhancement using 300 as an example, but it's not the creepy motion-capture that Beowulf is. Perhaps we should rely on superior special effects of a true master:
I'll have to carve out a few minutes to listen to the podcasts available only to us webmasters (I think?) and see what the story is on the, er, story.