Dream or Memory
Tom walked as far as he could up the curved side of the tunnel, almost making it to the part where it was completely vertical. He saw a round bubble of glass, about three inches tall, bulging out from the wall.
Scared to touch it, he leaned forward and took a closer look. A freaky distortion of his own image stared back at him, but nothing else.
"You're gonna break your neck," Hana said. "Come back down, and let's figure out what we need to do."
Tom scooted down on his rear end, then stood back up. "Maybe we should just start walking."
"Which way?" Hana asked.
"Whoa, whoa, whoa," Max said. "It was a borderline eight on the dumb guy scale to come in here in the first place. If we start trottin' off away from this door, we'd be complete idiots. Did you forget about that really big train that goes really fast?"
"Maybe we could stand to the side and jump onto it when it flies by," Tom suggested.