The Canadian weather forecast thread where the guy hit the jackpot brought this to mind.
For a very short time there was a dog track in Henderson, NV, the town that borders Las Vegas. Our pit boss went there to bet on the dogs one day and he couldn't do anything wrong.
For five races in a row he had the winning dog.
A guy sitting next to him asked him how he was doing it, and he points out a column in the racing form, 111/8, 12. 12 1/2, etc...and says, "Look at these dogs time in their last race."
The guy says, "Time? That's not their time in any race, that's the dog's weight!"
His "streak" stopped right after that.
Luck? You betcha!
The people that ran the track soon realized that Southern Nevada summers were no climate for dog races.