Kammala wannan magana: Bayan haka, Cielo ya tafi wasannin Olympics na 2008 a Beijing, inda ya karya rikodin Amurka a cikin mita 4 × 100 na 'yanci, tare da lokaci na 47.91 seconds. Ko da yake an cire tawagar Brazil daga gasar, an ba Cielo damar tsayawa. A cikin
A tseren mita 100 na 'yanci, Cielo ya cancanci zuwa wasan karshe, inda ya dauki matsayi na takwas a cikin zafin jiki, tare da lokacin 48.07 seconds. Cielo ya yi fice a farkon farkon wasan kusa da na karshe, inda ya zama na biyu, a 22.62 seconds, amma ya gama na biyar. A wasan karshe, Cielo ya yi amfani da wata dabara ta daban, ya juya na uku, a hankali (22.74 seconds) fiye da na wasan kusa da na karshe, kuma ya adana kuzari don kammalawa, wanda ya haifar da lashe lambar tagulla da karya rikodin Kudancin Amurka tare da lokacin 47.67 seconds (daura da dan wasan Amurka Jason Lezak). Alain Bernard ya lashe lambar zinare kuma Eamon Sullivan ya lashe lambar azurfa. Ba da daɗewa ba bayan lashe lambar tagulla, Cielo ya ba da sanarwa ga 'yan jaridar Brazil, yana mai cewa: "Yanzu zan ci nasarar tseren mita 50". A cikin tseren tseren mita 50, Cielo ya kafa tarihin wasannin Olympic, wanda Alexander Popov ya kafa a wasannin Olympics na 1992, a lokacin zafi (21.47 seconds, daidai da rikodin Garrett Weber-Gale na Amurka) da kuma a wasan kusa da na karshe (21.34 seconds). Ya rage wannan a wasan karshe, ya sake karya rikodin wasannin Olympics tare da lokacin 21.30 seconds, ya lashe lambar zinare kuma ya rasa rikodin duniya da 0.02 seconds. Tare da wannan, ya zama ɗan Brazil na farko da ya zama zakara a gasar Olympic. Har zuwa zinare na Olympics na Cielo, mafi kyawun sakamakon wasan motsa jiki na Brazil da aka samu ta Ricardo Prado, wanda ya lashe lambar azurfa a tseren mita 400 a gasar Olympics ta 1984, da kuma Gustavo Borges, wanda ya lashe lambar azurfa a tseren mita 100 a gasar Olympics ta 1992 da kuma tseren mita 200 a gasar Olympics ta 1996.