Run my first 15km in a crowd of 80,000 people. Gained 216m and done all that in 75 minutes.
I wasted more time dodgy people hence not being able to pace myself properly. Next year, I am definitely going to try running with a faster group and aim to do this distance in under 70m. I need to qualify in at least two races before then though.
Never in my life I thought I'd be thinking about running under a certain time, let alone qualifying.