Odd breathing pattern?

[terumi]

Hello people, 

I saw my oscar data today and I noticed something weird to my breathing pattern. What I have in mind as a normal breathing pattern is that the exhalation part is in duration and magnitude close to the inhalation part and as smooth as possible.
Today I saw something different, my breathing pattern had a "tooth", a "dent" and I though it would be better if I asked...

Is this normal?

   
   
   

[PeaceLoveAndPizza]

I see nothing strange, other than flow-limitations on the inspiration breaths.