I just tried this too. I managed to find a spot in the rafters that didn't trigger the event of them pushing him. Used sneak attack. They were lured away from him because they somehow saw my unlinked spider hiding in the other room. I had cases where it would still trigger the part and push him down even though no where near him. Also had cases where I killed both of them, no event seemed triggered, but the spiders would move up like he was pushed while he was gone and no body.
