Former Zappos CEO Tony Hsieh experienced a "psychotic break" in June, friends told Business Insider. During a bus ride while he was on vacation in Utah, an apparently delusional Hsieh asked friends to "sign a pact" that they wouldn't "intervene with this journey." The incident marked a turning point for the troubled entrepreneur. Loved ones became concerned for his mental health, and he eventually stepped down from Zappos in August. If you're experiencing a mental-health crisis, the National Institute of Mental Health has a number of resources. A June incident marked a dark turning point for Tony Hsieh and may have sparked a series of events that led to his quiet resignation as the CEO of Zappos weeks later, Business Insider has learned.