BoA’s funny pose

You've got “trigger-happy” people everywhere you go when you are a star. BoA barely had time to strike a (proper) pose in this shot and the pic has left us wondering. Which of the following do you think she is doing?

1. She's checking to see if her underarm deodorant works!
2. She just went to the gym and is showing off her bicep!
3. She tripped and quickly grabbed the chair to prevent herself from falling!
4. It’s the latest kung fu stance called one-arm & one-leg kicking.

Wait, wait, I've got my own scenario, I think she is...