Otto passed him a pitcher and damned if the guy didn't drink it straight down!
"That'll be ten munits," Otto said.
"For water?" the man asked.
"You're on Mars," Otto reminded him.
"Oh," the big fellow said, and jerked a few lumps of yellow metal out of a pocket and dropped it on the bar. "Will this do?" he asked.
Otto's eyes damn near bulged out of their sockets. "Where'd you get that stuff?" he demanded. "That's gold!"
"I know."
"It'll do fine." Otto picked out a piece that musta weighed an ounce. "Have another pitcher."
"That's enough," the big fellow said. "Keep the change."