Watch the 16th Note Displacement Combos: 7 online guitar lesson by Jon Finn from Rhythm Lab: Rock & Funk
Since grouping 16th notes in groups of 5 creates a 5-measure pattern, each example takes out two measures and demonstrates 4 two-measure patterns. Example 27 is the 1st and 2nd measures of Example 21. Example 28 is the 2nd and 3rd measures of Example 21, etc. Because you're playing a "partial" pattern by only playing two measures, there's a rhythmic "skip" in the pattern that makes it interesting and funky. But this time, it takes longer to get to the "skip".