In April 21st 1985, at the Portuguese Grand Prix in the Estoril circuit, Ayrton Senna got his first victory in a rainy race that damn, I really would like to watch it here & live in my country (but well, I was only one year old...)! 

His enthusiastic celebration still in his car after the checkered flag was one of the greatest moments in this sport!
As a small tribute as well, here is that historical moment reproduced in a 2019 F1 chassis.