A firecracker rolls into your cave and explodes.  The ceiling starts to crumble. 

"Okay," Rocky says.  "Not such a great idea to come here." 

"See!" the elves say.  "We should have gone to Cave H!" 

You hear an explosion coming from the tunnel leading to Cave H. 

"Or not," the elves say. 

"Like I said before," you say, "we're going to Cave I -- and that's final!" 

You swallow a magic pill that sends you back in time one click.