Rawr!  Cliffhanger!  
...Although I think the happy look on page 13 was cute enough.  Even if it's for a mission, I'm surprised that he didn't lose it there.
Personally, I like the TN notes.  Most of them have taught me stuff that I hadn't known before.   And apparently they don't break immersion because I got to the last page before I realized that there were TN notes in the chapter.