This is one of the weirdest things you could hear from someone, depending on the context.
One of my friends went fishing with his uncle. They journeyed well off the beaten track, and the two of them expected to see no one else. However, as they cast their lines into the water, they heard a truck approaching.
About a minute later, the truck came by. A man, sitting alone in the cab, leaned out the window and looked directly at my friend. For a few seconds, he said nothing, staring silently at the two of them. Then he spoke:
“I’ll tell you one damn thing.”
The anonymous driver drove away without an explanation. My friend never saw him again.
I like to think of the driver as a Buddhist monk, traveling along and sharing koans with random people, but he was probably just insane.