No, not when you have a moment when you feel like a moron for now knowing something.
First off, let me answer what's probably your first question:
A stupid moment, in this context, means something you did wrong i.e. Powerplay when you usually avoid such things, don't notice, and only notice when someone you're roleplaying with (or doing something like that with) tells you. Other things work too.
Usually, with stupid moments, you'll either not notice until someone points it out, or you'll remember it and then later realize: crap i did that wrong why did nobody point that out.
When reacting to a stupid moment, usually you will end up feeling shame if it was powerplaying in a literate roleplay.
So that's what a stupid moment is. They can apply elsewhere too, etc. etc. etc..
This post is mostly for talking about any stupid moments you or another person have experienced, but don't point and laugh... It's impolite.
Well as a compulsive typo typer myself it is quite hard for me to remember a single moment of embarrassment...
But I do remember one day my younger brother decided to play FH with me for a bit and after a while of goofing around the maps we wounded up at Fluorite where a couple of the moderators were and he began to buttswing pretty close to their faces... Oh god I just remember saying 'sorry' a lot and running away
*covers face*
As soon as I saw him swinging dat booty
(http://media.giphy.com/media/REHuA9Ce2n6WQ/giphy.gif)
NO NO NO STAHP
Eeeeee.. That's what I get for not making him read the rules though.
Clicking on someone trying to read their bio and then running towards them.
You're not the only one, my friend. This makes up almost all the moving that my characters do.
But back in my newbie days, I would go around as a majestic glitter monster lion thing and try to eat TLK cubs.
There's more, but that's all I can think of for now.