Safewords are words or phrases that are called out when things are either not going as planned or have crossed a threshold one cannot handle. They are something both parties can remember and recognize and are, by definition, not words commonly used playfully during any kind of scene. Words such as "no", "stop", and "don't", are often inappropriate as a safeword if the roleplaying aspect includes the illusion of non-consent. The most commonly used safewords are "red" and "yellow", with "red" meaning that play must stop immediately, and "yellow" meaning that the activity needs to slow down. "Green" is sometimes used to indicate that the activity is desired and should continue. At most clubs and group-organized BDSM parties and events, dungeon monitors (DMs) provide an additional safety net for the people playing there, ensuring that house rules are followed and safewords respected.