[PBRSTREETGANG]

Did she pay for the "unsalted' fries, and did she ever get them?

I would presume that she paid for the "unsalted fries" and was told by the people at the window to move up so that the people behind her could proceed...which she apparently was unwilling to do.

Getting unsalted fries at McDonald's can take a while as the person taking the order haas to catch the next batch of fries that come out before they are salted. Others needing orders of fries and walking by may dump the next batch and salt it before you get to it. (Just saying.)

[driftdiver]

“I would presume that she paid for the “unsalted fries” and was told by the people at the window to move up so that the people behind her could proceed...which she apparently was unwilling to do.”

No, she moved to where they directed.

[BlueDragon]

That makes sense to me. What we don't know, concerning what transpired in the McDonalds kitchen [if we can call it that] could well have been a contributing factor, as I've alluded to just previously.

I imagine that it's even possible that, once the stubborn old lady started causing trouble [be impeding the flow, at the drive-thru window] someone there may have exacerbated the situation, once they saw that a police officer was involved? If any thing deliberate like that occurred, then they sure were not doing the poor cop stuck dealing with the mess, any favors!