A gaming machine displays on a display a horse racing game in which racehorses race against each other, and receives, via a gaming terminal, a bet made by a player regarding an order of arrival of the racehorses in the horse racing game. A user is provided automated alerts that are responsive to detected events, where an event may correspond to an occurrence happening or an occurrence not happening within a predetermined duration. The trifluoromethane is believed to create a polymer passivation on the sidewalls of the hole being etched which, when the etch reaches the oxide-silicon interface, protects the interface and underlying silicon.