A new female personal trainer at the gym is very enthusiastic.

While guiding me on the bench press, she kept her hand lightly supporting the barbell.
I said, "You don't have to be so nervous, I can lift it."
She smiled and said, "It's not that I'm afraid you can't lift it, but that you'll be exhausted at the last moment, and the barbell will fall."
Our faces were too close when it might happen.
I was stunned for a second, then I managed to push 15 reps in that set.
Usually, I can only do 8.
Turns out, men's potential can be stimulated like this.