Some things you might want to know before working on this lesson:

1. Basic time (quarter-notes, eight-notes, measure)
2. This is an active lesson-you have to actively participate to get something out of it. Also, it may be helpful if you forget any theory that you know whenyou practice this lesson ;) Put your loop to '4 times' or 'Forever'

When practicing this lesson, you shouldn't have to 'think' very much, you should mostly be listening.

Your first goal for the lesson is to sound bad, in a sense- Play rythms that fit well with the groove, but you should try to only play notes that sound bad, or 'clash' with the groove.

Explore the first 6 frets on the guitar (all strings) with the track for a while, listening and remembering the notes that clash. I wouldn't recomend playing fast at this point, probably no more than 2 notes/measure, so you can really hear the qualities of the notes.

After you have made your mental catalog of the bad notes, try to improvise a line, with a steady rythm (a suggestion would be quarter, eighth-eighth, quarter, eighth-eighth...) using the bad notes that you know

Keep in mind, you should be trying to make all of the notes you play clash with with the groove. This may be difficult at first, but with practice, its possible. And don't worry if what you are playing sounds good occasionally, just try a little harder to dirty it up :)