I have a work colleague who can lack a filter at times and sometimes comes out with things that she shouldn't and that offends.
This week two older members of staff have been blanking her and firing orders loudly at her. If that was me I'd have smacked them by now 
She's just sat ignoring them. Literally not reacting at all and continuing to go about her day (well evening). It's as if they're not even there!
She really doesn't give two hoots.
I would love to be more like this but I don't think I have it in me and would have blanked them back or got annoyed.
How do you think someone gets the skills to react like my work colleague? Is it not more effective to stand up for yourself?
AIBU to be amazed by this and how does one get the skills to stay calm?