Here’s a great video of Ayrton Senna – referred to by his paternal name Da Silva – winning the Leinster Trophy race at Ireland’s Mondello Park in 1982.
Senna, in a yellow car to match his distinctive yellow helmet, went off on the formation lap (not shown) and at the start Joey Greenan jumped ahead of him and took the lead.
However on the third lap Greenan had momentary difficulty selecting third gear and Senna passed him on the approach to Duckhams corner.
http://youtu.be/XJKtOYmK8I0
Senna won 16 out of 19 races in FF2000 that year, won the British F3 championship the following year and by 1984 had made it to F1.
More here: http://www.motorsport.ie/senna-at-mondello-park-the-full-race/