Katrin has her slave on a stool on his back, his head is bendt over the edge, his throat and larynx fully exposed, ready for the treatement.
She sits first reverse on his throat, putting all her weight (this is a lot!) on the poor throat, his neck gets bendt back to the maximum, short before it breaks.
She changes several times the position and direction, sits foreward, sideward, again reverse and so on.
The windpipe under her gets full crushed and the necks breaks nearly, she's like a guillotine wich beheads her victim.
After 4 minutes he was totally destroyed, so we had to stop the clip.
Don't try this at home with a lady of this size and weight!