Yep, I have been pulled over too many times to even count. Every single ticket I received, was handed to me through the window. 95% through the driver side, 5% passenger side, but all through the windows. The only times I was order out of my car, was a few times when they wanted to search my car. In those cases, I was handcuffed, so I wouldn't have been able to sign a ticket outside.
There is no logical reason to order her out of the car to sign the ticket. That is not police procedure anywhere. As a matter of fact police officers get very upset whenever anyone tries to get out of their car during a traffic stop. The police officer is most safe when the person stays inside their car.
The cop was just messing with Sandra Bland and trying to provoke her when he ordered her out of the car.
Dude! Your life is seriously more exciting than mine!
I was told decades ago that one should always step out of the car when stopped, so that the officer(s) can see one isn't armed. So the next time I was stopped (expired registration sticker on a borrowed car), I turned off the ignition and got out as the officers approached. I ended up facing a female officer almost a foot shorter than I. (I'm 6'3".) And I SAW the flash of fear in her eyes, even though she recovered immediately as I stepped back from her with my open hands clearly visible.
I got to take a drunk test for my stupidity (I wasn't drunk), but even so, I wasn't abused or disrespected. I did learn a lesson about getting out of the car when stopped.
So, yeah, I have to wonder why the cop in question wanted Ms. Bland out of that car...