John Eliot Gardiner conducting the English Baroque Soloists. The "trio" section in the middle is a countermelody to the minuet proper. This permits Mozart to transition from the trio back to the minuet without a cadence. It's pretty slick.
Publius, thank you for the link. Hopefully I can find the rest of the symphony as well.
Truly, Mozart just had this natural gift for the math of the beauty in life.