There are a few rules when it comes to attending a major sporting event in the UK.
1) Never aim a big camera at a man with a gun in case he mistakes you for a terrorist. Or lunch, apparently.
2) Never aim a big camera at a freshly famous athlete in case he mistakes you for a pap. Or ginger stalker.
3) Never aim a camera at a minor media celebrity because... well, because they already get enough attention.
4) Never get a job in advertising, because you may be forced to write drivel like this.
5) Never allow yourself to think "what a lovely day!"
Because...
Just as you're trying to watch our cyclists collect another medal, with the velodrome in the background...
It is likely to rain a bit.
Then a bit more.
And some more.
Then it will start raining properly, because by now it's got the hang of it, and wants to qualify for the Rio raining team.
But if you think positive thoughts and relish our unique summer weather, the sun may kimonout again.
Eventually.
Giving you chance to see the incredible crowds rather than just the inside of your hood or the underneath of your umbrella.
You may even remember that you're supposed to be visiting an actual event.
Or maybe it's a show, not an event. Strange sport. Tough, but strange... and pointless. But curiously entertaining all the same... even if you have to be on your guard in case you're staring a bit too hard at a 15 year old.
And here's an entrant in the asim18-a-like competition.
Eventually it was time to head for the hills at the end of a superb experience.
But it was very hard to walk past the stadium without frequent pauses to listen to the crowd's roar. It was enough to raise goosebumps. Somewhere in there Usain Bolt and the fastest men on the planet were performing.
There were a few distractions to take your mind off it...
...but walking away from the Park at the end of a 26 hour day was very hard. And not just because I was completely cream crackered!