When unauthorized parallel meetings were held
at the Conference of 187 countries, leader Yvo de Boer, not known for his emotion, was overcome by jet lag and obstructionism and burst into tears.
According to the UK's Daily Mail:
Officials from China, which feels Western countries should do more to reduce their greenhouse gas emissions, accused UN negotiators of ignoring conference protocol.
Mr de Boer, distinctively dressed in a floral shirt, stepped up to the microphone to defend his staff - only to find that the words would no longer come.
As his unfinished sentences trailed away, he broke down and walked off the platform to supportive applause.
"He wasn't just wiping his eyes, he was in floods of tears," said one observer.
"Three colleagues - one of them a woman - formed a protective group around him and escorted him out of the hall. It was all very dramatic."
Mr de Boer's breakdown came after nearly a fortnight of squabbling over proposals to cut carbon emissions.
Then there was piling by the US, recently overtaken by China for the spot of World's #1 Greenouse Gas polluter. US delegation chief Paula Dobriansky , a pretty face with an ugly message, was booed for refusing to support the Conference goals.
One delegate, from Papua New Guinea, pleaded with the US to lead on the issue. "Lead, follow, or get out of the way."