It's one thing to take a class in how to fix a flat/replace the tube. It seemed easy enough when I took the class a few years ago and even easier when I took a refresher in May.
It's another thing to watch experienced people replace their tubes while on a ride (last one being less than a month ago).
BUT IT IS A WHOLE OTHER THING TO HAVE TO DO IT BY YOURSELF FOR THE FIRST TIME IN YOUR LIFE (9 years of riding) ON A SOLO RIDE OUT IN THE BOONIES!!!!!
And the rear wheel too, so that I had to deal with the chain.
My mind went blank.
I couldn't remember if I had a spare tube (of course I did) or where it was (in my saddle bag of course).
I didn't recognize the tire levers.
I couldn't get the wheel off the frame (gotta remember to flip open that little lever thingie).
I couldn't get the wheel clear of the chain (that's what the derailleur is for, dummy).
I couldn't get the pump re-set for the Presta valve (it's a double head pump, so it's not as if there's actually anything you have to do to re-set it).
I couldn't get the tire off the rim (turns out that's what the tire levers are for -- what a concept!!!)
I couldn't remember if I was supposed to put the tube on the rim and then put the tire on over that, or put the tube into the tire and then put the whole thing onto the rim (I mean, it's not as if I hadn't just seen it done a month previously).
I almost forgot to put the valve stem through the hole in the rim (you mean the valve stem doesn't just sit inside the tire????).
I couldn't get the @!*^$$ tire onto the rim (for once in my life, the problem was that I wasn't using enough force -- versus my normal problem of using too much force).
Anyway, it took me a little over an hour to do the job and get the wheel back on the bike. By the time I was done, I literally had every gram of chain lubricant on my hands and shirt (the chain was bone dry). I was also wearing every bit of road grime that tire had ever picked up.
And then, just to add insult to injury, a little over 1/2 mile down the road, there was a bike shop (it wasn't visible from where I was). I could have just walked the bike down there and had them do it (I had no idea that there was a shop that far out in the boonies).
At least the people in the bike shop had a good laugh when they saw me/heard my story. They laughed so hard they even re-lubricated my chain for free.