In Solo #3, we’re starting off with a phrase that is related much more to G major than to the D chord, despite the fact that we’re playing over a D in the progression here. The tonic of the key and its related triad enjoy a special status unlike others, kind of like playing a trump card. If you’ve lost your place in a solo, that makes these notes a great place to come back and re-orient yourself.
In bar 2, we use a short portion of a longer switchback pattern that I really enjoy using. I didn’t have time to really mine this idea out in the lesson, however you will find tab to help you in the course book (have you downloaded it yet?) Let me know if you’d like to see more patterns like that one.