Cautiously maneuvering the car into traffic, Walt said, "Tell me what you know about combustion engines."
Walt displaced air again. He put it back. "I asked you to tell me what you know about combustion engines."
The man kept dabbing at his lips.
Gasping, the man began to explain. He did not seem too sure of himself. Every other sentence, he faltered, and Walt had to prompt him sharply.
"This fuel ... this gas.... When the supply is used up, how does one obtain more?"
"From a ... gas station...."
I'll have to watch the fuel supply, Walt thought.
"They're ... they're on nearly every corner," the man said.
Walt nodded. I've got all I can from him, he thought. "Do you have a small, heavy object?"
The man licked his cut lip. His eyes were wide with terror. "Y—ye—yes."