Anabela wears boots with blockheels and tramples her slave with classical music.
The music gives a touch of celebration of inflicting pain with such "harmless" heels.
She walks on him like on a carpet, the sharp edges of the heels cut deep in his skin.
His groin-area is a perfect victim, jumping on it make fun... and pain.
And what's about throat- and facetrampling... looks also painful ;-)