Bobble/Stumble
A slip or a duck from a horse trying to leave the starting gates, often caused by the surface giving way under the feet. This can range from a mild misstep to a stumble down to their knees.
Paddock
The area where horses gather before the race to be saddled and paraded for the public.
Daily Double
A wager on two consecutive races on the card where bettors have to pick both winners.

