Wilf Wolf's Party

Wilf decides to unleash his inner pioneer and travel into the mines for gold! Wilf grabs his mini pickaxe, puts on his tiny headlamp, and has Owlsworth fly him to a nearby snowy mountain!
It's really more of a snowy hill, there are no mountains in Wisconsin, but Wilf doesn't know that.
Once Wilf arrives, he gets straight to work, as he has no time to waste. He has a party to throw! Wilf starts swinging his pickaxe into a rock. As Wilf is hard at work, he suddenly hears a noise, coming from the top of the hill. Wilf is curious what the noise is, but also very scared.
What does Wilf do?