I am well aware of that. I work in Human Resources.
I know...it was more for the benefit of others. And frankly? I think the OP's employer is being either incredibly generous, or incredibly stupid: A walking boot/cast is a health and safety hazard in a lot of work places, food services being one. If I were the manager/owner, I would not allow her to wait on tables, carry trays, be in the kitchen/pick up area, with a walking boot, but that's just me. The potential for further damage to the OP's foot, the potential safety and health hazards, far outweigh the benefits of having the OP back to work.
As to the Mgr putting her hands on the OP. We're only getting one side of the story. Had the OP been told to leave? Had to OP given the Mgr a face full of attitude?