If you feel the negotiation is going in a downward spiral consider how big the outcome (good or bad) would be if you walked away. (inc.com)
Rather, couples get caught in a downward spiral of defensive reaction and negativity that feels gut - wrenching and out of control. (couplescounseling.com)
Thus, these students become caught in a downward spiral of negative emotion and poor achievement.» (sciencedaily.com)