What sends shivers down your spine when you play it on your system?

The 1st movement of Mahler 9.
Rachmaninoff “The Bells” 1st and 2nd movements (I have about 20 different versions of the piece.)
Brahms Cello Sonata #2, 4th movement.
Schubert Piano Sonata in Bb. D.960. (And much other Schubert.)
Anything by Eva Cassidy (Can’t help but tear up when she sings.)