Though the group cannot clearly through the webs covering the northern opening, they can see the lone berserker's torch, and hear the sound of his combat with what is presumably the spider. They hear his grunt as he attacks, and hear him scream in pain as the spider bites him! (4 damage, poisoned!) He then begins panting and growling animalistically.
Aghilas:
Note: The web has inflicted 24 points of "control" on Jaskar, which is the grappling equivalent of a lot of damage (it's compared to hp to determine effect). Attempts to get free are attack rolls which let you remove control on a successful hit. Jaskar is not able to move really until the control gets below his hp, but he can roll at a stiff penalty and presumably over a period on the order of turns would be able to get himself free...