Shout Music makes me think of one word: JOY!
Shout Bass Line Variation 1

Pattern Appreciation: Don’t try to “memorize” this. Remember: Study first, practice second! That said, the pattern is not at as complicated as it seems. The “target note” C (Do) is always approached with three note chromatic pickups, either ascending or descending. F (Fa) is a bit different: While it can be approached chromatically from below, this just doesn’t sound right approached from above. The smoothest sounding-feeling approach is Mixolydian scale-wise. This is just one of those things you learn by experience and by trusting your ears above all else.

Technique Tip: The proper way to walk is to drop the weight of your arm-hand into each note. Try to sound like a bass player thumping out juicy, round, big, fat notes.
Shout Bass Line Variation 2
Here we just exchanged the ascending line with the descending line and vice versa…

Rhythmic Conception and Interpretation: Feel each chorus as coherent 2-bar and 4-bar ideas, not as isolated notes or four-note segments that end at the bar lines.
Shout Bass Line Variation 3
A tasty hybrid of variations 1 and 2…

Can you think of some other ways to connect the chord tones?