... if your King is under attack you don't worry about losing a Pawn on the Queen's side.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Unknown"] [Black "Unknown64"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "1k1rr3/p3n3/2R5/1pPqNppp/1Q1P4/7P/1P3PP1/3R2K1 b - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Nxc6 2. Qxb5+ Kc7 3. Nxc6 Qxc6 { Black wins with a large material advantage. } 0-1