About this scene:
We see here that the Tauntauns have been attacked by something, but we don't know what it is quite yet. This is not long after Luke has been attacked in the wasteland by something unknown as well. Han takes little note of what has happened here as he is too busy worrying about Luke.
This was part of the whole Wampa storyline that was trimmed from the film. A tiny bit of this scene is left over in the film: we see a dead Tauntaun on the floor, but we don't get any mention of what happened.
Some of the photos here are from behind the scenes, and you can see crew members in the background.
INT MAIN HANGAR DECK - TAUNTAUN CORRAL - NEAR ENTRANCE
The Deck Sergeant and several Troopers inspect the mangled remains of three dead Tauntauns.
Some of the hardware nearby has also been brutally pulled out of shape. Several surviving Tauntauns shuffle nervously nearby. Outside the light is slowly fading.
TROOPER (to Deck Sergeant) ... I can't imagine, sir. Their necks are broken.
The Deck Sergeant nods, then notices Han running up and steps out of the group to meet him.
Behind the UnScenes
The crew sets up for filming.
Gary Kurtz and Irvin Kershner look on as Harrison Ford enters the scene.