When Grady Matthews built his pool room in the springs mid 70's before Scott Smith showed up, I happened to be in there every day, and in walks Surfer Rod a box player, dressed sharp/always.
Gradys room was an action/magnet time in life, many came thru, including Black Bart... with the Belguim Red Circle Cue ball, replacing the heavier blue circle cue ball in the Centennial set.
Anywho.... back to rod/shoulder/action.
I could break the rack on a 9' but rarely made a ball.
I knew Rod was a bar table/player he might run 1 rack/might in an hour.... with my repair and gimpy arm he wanted to gamble on a 9'

.
After about an hour and a half, I had em stuck for about $200 sumptin I had to go to the bathroom.
Walking back to the table/from a distance I immediately noticed he'd replaced the cue ball with the big/heavy rock.
He wanted to jack the bet, nooooooo problem.
He quit after about $400 stuck.