The whole football world knows Cristiano's goal celebration, it's even been immortalized in FIFA video games. His 'Siuuuuuu!' roar has been imitated by basically every teenager who played football.
Cristiano himself insists that he came up with this celebration in an absolutely spontaneous way:
“It was when we [Real Madrid] were playing Chelsea in the USA [a 3-0 win over the side coached by Jose Mourinho in August 2013] and I really don’t know how it came about,” Ronaldo said in an interview with YouTube channel Soccer.com as cited by Diario AS.
"I scored and it just came out. It was completely natural, to be honest. Afterwards, I realized I enjoyed it and started to do it more often. I saw that the fans liked it and that they’d remember it so I carried on doing it", the former Real Madrid forward explained.
This celebration has certainly helped Cristiano to develop his brand and become one of the highest-paid football players in the world.