I saved my grandmother's life with this. She was embarrassed and didn't want me to. Super weird. She looked all round soft but her diaphragm was surprisingly tough, and it took a couple tries. A year later I learned that I had broken one (maybe two?) of her ribs.
Thank you for the story! I helped my brother who was choking on a cough drop. Didn't use Heimlich, but nevertheless it was a scary experience.
I hesitated to which one is the correct move.
Edit: As far as I understand, one uses Heimlich if hitting on the back while bent doesn't work.