Tomo Fujita Guitar Wisdom

Would you take a look at this and see if I have it right or am missing something... In Tomo's Youtube video"Mixing Major and Minor Pentatonic scales" (People Get Ready) At about 14:06 he plays a nice lick that seems a little bit like a turn around. Can you explain...I think it starts by outlining a Bm triad and then goes back to D major pentatonic. But at 14:10 he hits an Ab on the 4th string which sounds great but isn't in the scale. I think it sounds good because the chord that it's played over is a E9 and Ab is in there. Is that right or is there something else maybe easier that I missed?

I think this wasn't part of the material he was trying to get across but it's in his solo performance and I just want to understand it.
Thanks! Bruce

On reflection, I think he plays the Ab over the II chord which he made dominant in his arrangement, ie simply an E9 instead of the expected (Tomo says “stronger”) Em7, in which case the Ab (G#) is just the M3 of E9.

Thanks for your help!

Here is Tomo's comment:

"Thanks so much for subscribing to my Guitar Wisdom. I will think about creating a Guitar Wisdom lesson on this song. Analyze those notes as much as you can. I played a D Blues scale, where Ab is the b5."