A clanger in Australian rules football is a term coined by Champion Data founder Ted Hopkins which refers to a turnover or a silly mistake made by a player. Its vague description in statistical tables is "errors including frees against". Examples of clangers include, * Any disposal or deliberate knock-on that goes directly to an opposition player. * Any free kick conceded * Dropped marks or fumbles under no pressure * 50-metre penalties conceded * A Ball-Up Kick In (Stepping over the line when kicking in after a behind)