Silvia Matta almost ripper the head off my shoulders. Not only is she strong like an ox, she is also an experienced MMA fighter. Even though she considered it an easy training session, I felt like trapped in a tumble drier.
One professional domme asked me to punch her belly. Gave her a few jabs, she asked for a real one. Provided an upper cut into the belly ... no reaction (felt like a steel plate, without her even flexing). Then she was punching back :-). Ended up in a leg scissor hj best relief ever.
One session worth mentioning, because of her mental strength. Sharp tongue and loves to demonstrate her superiority at any point- Seems like she has overcome some hard challenges in life, a survivor and natural leader to the bone. Now ... the interesting thing about the session: she was strong, but not SO strong that she could seriously hurt me if I would not let her. So was jumping on me with foam in front of her mouth giving it all. By that time, I found the hard trash talk even more violating then physical injuries. I seriously challenged her to find out who the superior person is, but she literally wrestled me into the role of a single minded softie, verbally as well as physically, and even enjoyed.