Definitely it has to be the 2015 season at COTA, it was a challenge on stand in the weather and the whole rain we got that weekend. Seeing Lewis passing Rosberg at Turn 1 in the first lap was amazing and he was able to clinch the championship that race... Took my British flag and waving at it at the end, he pointed at the flag! was awesome... On top of that I was able to score the signatures of all the drivers from the season. it was awesome!