Embarrassed to discover that a girl is stronger than you

[Afffenmann]

Two day ago at a New years eve party I wanted to mix some cocktails. However I was unable to open one of the bottles. The lid was stuck. I really tried, but I could not open it. I believe my grip strength is above average.

A girl stood nearby and watched me. I've known her for a while. She is slim, athletic and pretty, but not muscular. I'm both taller and heavier than her.
She then offered without any irony in her voice "Should I do it?"
I said "yes, please" and gave her the bottle, not expecting her to be successful.
Then she just twisted the lid and opened the bottle seemingly without any effort at all and gave it back to me.
I just said thanks and mixed the cocktails not commenting on it. We both acted like this was normal.

The cool part was not, that she was able to open the bottle, but the way she offered to do it, like there was no doubt in her mind that she would be able to do so, even after seeing me fail.

I told her boyfriend about it and he just said "yeah, I know. happened to me, too"