Each spin of the wheel provides a multitude of options for the player. A player may bet on single numbers, rows of numbers, or on adjacent numbers. A player also may play colors, odd or even numbers, among others. A bet on a single number pays 35 to 1, including the 0 and 00.

Zero is neither red nor black, high (passe) nor low (manque) in roulette, nor is it counted as either even or odd. Mathematically, zero is even, but if roulette treated it as such, then pair would be marginally an odds-on bet paying off at even money, which would be a loss to the house.

The distinction between terror and horror was first characterized by the Gothic writer Ann Radcliffe (1764 1823), horror being more related to being shocked or scared (being horrified) at an awful realization or a deeply unpleasant occurrence, while terror is more related to being anxious or fearful.

Terror is usually described as the feeling of dread and anticipation that precedes the horrifying experience. By contrast, horror is the feeling of revulsion that usually follows a frightening sight, sound, or otherwise experience.