Originally Posted by: caponi14Do you think that the fast solo at the end from 4:34 to 4:50 is improvised pentatonic notes?[/quote]
It's simple single position B minor hammer on, pull off licks. Most of it is pentatonic.

Like this:

E |-12-h-15-p-12------------------------|
B |---------------15--13-h-15-p-13------|
G |---------------------------------14--|
D |-------------------------------------|
A |-------------------------------------|
E |-------------------------------------|

It could be either improvised or composed. If it is composed, then you memorize all the notes like you memorize anything else: one note at a time and practice.

If it is improvised then it is simply practicing scales and licks until you get to the point where you can combine two things:

1. Be able to instantly think of any note as a particular scale degree and a chord tone from a chord in the progression.

2. Have a large pre-established "bank" of licks you already know and can pull out at a moment's notice, in order to do something musical based on your visualisation.
[QUOTE=caponi14]
Is it even possible to learn to improvise like that?

Of course it is. :) Competent guitarists do it all the time.

You should start by understanding scales, chords, how they relate to each other, how to visualize them on the fretboard. And practice. A lot.

I suggest starting on the 2nd Fundamental course and move on the Rock and Blues Style courses.

http://www.guitartricks.com/course.php?input=2
http://www.guitartricks.com/course.php?input=blues1
http://www.guitartricks.com/course.php?input=rock1
http://www.guitartricks.com/course.php?input=rock2

I recently discussed approaching improvisation in depth in this thread:

http://www.guitartricks.com/forum/showthread.php?t=28867

The tutorials I did on learning to improvise are here:

http://www.guitartricks.com/tutorial.php?input=483
http://www.guitartricks.com/tutorial.php?input=491

To properly understand, practice and use pentatonic look here:

http://www.guitartricks.com/tutorial.php?input=296
http://www.guitartricks.com/tutorial.php?input=185
http://www.guitartricks.com/tutorial.php?input=722

Then after you can do all that look at this series of basic pentatonic licks that are pretty much everything that guy in the video does in a more basic, simplified manner to start with:

http://www.guitartricks.com/tutorial.php?input=170
http://www.guitartricks.com/tutorial.php?input=723

When you are done with those, try these:

http://www.guitartricks.com/tutorial.php?input=217
http://www.guitartricks.com/tutorial.php?input=232
http://www.guitartricks.com/tutorial.php?input=244