"You have a bad feeling about this basement"
In Thundermar when you enter a certain basement you get the warning message "You have a bad feeling about this basement...". Inside there is a spider, which is definitely not a threat to anyone who happens to be there.
What's the point? Am I missing something? Is that some sort of tribute to something I don't know?
This is one of 4 random (but very commonly) spawning encounters that make up the Wildhammer Tour of Duty achievement.