Facial contortion during breath work

Recently during an in person guided deep breathing exercise with a mental focus on letting go of limiting beliefs, my hands and face began to vibrate like pins and needles and my facial muscles suddenly went completely numb and contorted into a deep frown.

It was so weird and I began talking to the guide asking why my face was doing that. They didn’t know but suggested it might be some deep seated stored emotions or something. It was a bit comical because my face was so contorted, when I talked I sounded like the alien dude from men in black who wants “suuugar water” …but wtf was happening, any ideas?