The 31st of March, 2015. That is the day when @Phyrnna uploaded an improvisation that was longer than my longest upload thus far.
I knew from that day on, I had to upload something that was at least one hour long. That day, IS today.

Lol, I'm half joking though. Check out Phyrnna's track: http://www.newgrounds.com/audio/listen/616784

It's not rare for me to improvise for this long, but it sure is the first time that I recorded myself doing it. I had a lot of accidental technical issues though :(

My piano can only record about 20 minutes of material at a time. So I had to take short breaks (moving the latest, abruptly cut part, to my usb), before continuing. Even worse! I recorded about 1 hour and 5 minutes of material, but one of the files disappeared! D:<
The part that was gone was the original third part. BUT I THOUGHT IT WAS THE FIRST PART AT FIRST. So I improvised some 20 minutes more, and made a new, pretty identical intro (the only thing I planned on beforehand, was the first chord, which is also somwhere in the middle of this). So the first part you hear is actually the last part I recorded.
You will hear 2 fadeouts as well (the weird people that listen to the entire track), because the missing file caused a lot of trouble with tempo and chords :(

This improvisation also features me playing the piano while talking on the phone. I have no idea where that part is though (I know it wasn't in the missing part though, as it was somewhere in the original first half hour), so I must've covered it up pretty good.
There are like 2 small parts that are old ideas that found their way into the improvisation. I also accidentally started playing already known themes at points (Like "Great Destiny Man" and such), but I tried to as quickly as possible go away such things.

I also wasn't afraid to go completely nuts/experimental. I wasn't really trying to make anything amazing; just show you what an avarage improvisation of mine could sound like (No "Improv on Clarity" quality here). There are a few good parts here and there though. This is also how I sometimes make songs. I actually had a great idea in the third (missing) part, which may or may not make its way into a song in the future!

But yeah. This is meant to be enjoyed as weird background music. I don't think that anyone will seriously be spending an hour listening to this while just staring into a wall or something (well, I did once, but that was to check that everything was okay).

As for keys, the ones I used the most are my trusted G minor and C minor, even if I switched it up now and then.

I think that this long description is enough though.

The piano I played on is my trusted Yamaha Clavinova CLP - 230. Some reverb added with Cubase.

Enjoy!