I've attended two mega events (the Geolympix in Oxford and the Kent Mega in 2014). So I just qualify. You can check my profile but I've attached a screenshot too.
The cache was an easy find in the first place I looked.
I moved off to get the next one, but just then it started to rain quite heavily. I looked at my watch. I was due to meet my daughter in Bristol in just over an hours time, so rather than get soaked I decided to call it a day.