I know some of my parents' friends think 'Little Britain' is in incredibly poor taste. But swimming the Channel? You can't really say anything negative about that, can you? There's nothing better than making your parents happy. The glee on my father's face that day was amazing.
When you are doing endurance swimming you just need to take in as many carbs as possible to put on as much weight as you can. Basically you can eat whatever you want, which can be quite fun. Everything is guilt-free.