Sandra Bland was, in real life, threatened with a taser. In other real-life incidents, people who were cooperating have been shot, tasered or beaten. Real life isn't all Dragnet, either.
She was only asked to get out of the vehicle because she was self-admittedly "agitated" and began increasingly berating the officer in a way that was keeping him from finishing writing the citation.
So again, if an officer asks you to get out a vehicle, comply and ask if you're being detained. Don't grab your phone, don't tell the officer he doesn't have a reason to ask you to get out of the vehicle, after just admitting that you're agitated.