Stan gets out a remote control which he uses to steer the car out of the tunnel. Stan runs away from it and jumps onto the front of the train car. Stan says he is thankful he installed headlights in the train cars, and the headlights brighten the tunnel to reveal the Shape Shifter (from the episode Into the Bunker) behind Stan. Stan looks around in confusion, but then spots a carving on the wall reading "property of Stanford Pines" Stan tells the riders that they must be in "that undeground bunker Ford was telling me about". Everybody then lands inside a strange underground dirt tunnel. Panicking, Stan begins to pull riders' car away from the tree, but that causes Stan and the riders to fall through the ground. He then urges riders move away from that area. Stan then looks and sees the big tree behind him.
Out of breath, he says he regrets adding rocket fuel to the train cars. Riders then make another turn and drive through the forest before stopping in front of a big tree. Mystery" and wants to create his own attractions again. But also because he can't stand Soos now being the official "Mr. Stan tells riders that the forest is the perfect place to find mysterious objects, which is why they are there. The car makes a sharp left turn and stops in front of Grunkle Stan, who welcomes guests to his "Mystery Train Ride Through the Forest" attraction.
In the forest, the find the boarding area. Guests walk around a basic queue in the forest at night where they pick up there "Mystery Eyewear" (3-D Glasses).