"Okay,..." Dave starts.
"Let's go this way."you and Dave say at the same time, as
you both go down different forks.
"Dave?" you say and you don't hear an answer. " Dave,
this isn't funny. I want you to answer me." again no answer.
In the other tunnel.
"Hey you! Answer me, I've been calling for five minutes, and you
won't even answer!"
"Dave, I see a fork in the tunnel!" you say.