Between the two it has to be Torres. Personally, I think Cro Cop's fall was harder then anybodies. At least when Fedor fell he lost to some accomplished MMA fighters. Cro Cop was losing to middle tier and unproven fighters. It was just painful to watch.
Yeah there have been some painful falls. Chuck losing to Jardine was a low moment for me. Jens losing to Louzon was another painful one.