For a while there, we Brits were so happy we almost knew what it was like to be American.
From the Jubilee through the Paralympics, by way of the Olympics, we altered beyond all recognition.
We smiled on the bus or the Tube. We talked to strangers. We said "have a nice day" without irony dripping from our voices.
I have named this the Jooblimpix Effect and it is so very over.
So many strange things happened.
The weather was unusually good. The Olympics and Paralympics worked. The Tube and bus network actually decided to function.
Now, the party's over.
On public transport - usually delayed or non-existent with a big measure of "planned engineering works" - people glare and hide from each other.
In the street, people walk along bellowing abuse and swearing a lot on their phones.
Nobody tells anyone else to have a nice day.
Yes, it's all a lot more normal, but I miss the happiness, enforced and weird though it was.
For a few months, we all rose to the occasion and acted like I am told we did during the Blitz.
We were nicer and warmer.
Could someone in the government please figure out whatever it was that was put in our drinking water and make some more of that drug, please?
This is like a shared hangover. I want my fireworks and parades and celebrations back and I want them right now.
I'd settle for a little more cheerfulness in public places.
Oh well. Jooblimpix was fun while it lasted.