AU2 - Williams - Race 9

Bolt

A sudden veering to the inside or outside rail, often caused by the horse spooking or shying from something.

Apprentice

A new jockey who has not ridden a certain number of winners in a specified time period.

Minus Pool

A pari-mutuel pool – typically a show pool - where one horse is so heavily bet that after deductions there is not enough money left to cover the prescribed minimum on each bet.