Question

1. She stood on her hand at the concert.

2. She stood on her hands at the concert.
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Do we have to use 'hand' or 'hands'? Are both Okay? Which one is commonly used?

Answer 1

I'm not sure what you mean by this. I know of acrobats who stand on their hands in circus or other performances, but I don't know the expression "stand on her hands" at a concert.

Please explain.