Yeah, I don't know how he's doing it either. Same with his mum's funeral and everything that went on there. He must have a lot of stamina. And a lot of energy. I'm about 20 years younger than him. I couldn't be arsed. And it WOULD tire me out.
I went to a wedding last October. 8 hours in total. 4.00 in the afternoon til midnight. There was no break or reprieve in the middle. I was shagged by about two thirds of the way through, and tired for a few days after.