I was listening to a particular jazz song the other day,
"First Song", composed by Charlie Haden, recorded by him together with Enrico Pieranunzi and Billy Higgins in 1990.
I realized something which I found to be rather odd (for Jazz): it had, what I think is a Coda, i.e., after everyone finishes their solos, the pianist Pieranunzi starts a somewhat free and faster cadence-like improvisation that seems to conclude the song. In the particular recording I linked to, the pianist's solo ends around 7:22, they all repeat the theme, and then at around 8:32, instead of going to the last note of the theme, the pianist start a somewhat free improvisation which feels a bit like a pedal point or a coda.
My questions are:
Can someone characterize a bit more precisely what is happening at that moment?
If this is indeed a coda, how common is it in jazz?
Can you provide other examples of such phenomena in jazz?