THIS is what happens when people stop being polite ... and start getting real.

No, we're not talking about an MTV reality show. Instead, we're talking about the A Line, which was trapped for hours between Denver International Airport and Union Station Friday evening. The situation wasn't resolved until around 8 p.m. -- after an hours-long saga.

It all started just before 5 p.m. That's when RTD first tweeted that the A Line was experiencing "severe delays" due to two trains that got stuck on an overpass near 61st and Pena.

RTD called the trains "disabled" but a photo from a 9NEWS viewer showed what actually happened: the train was stuck! Far above ground!

The A Line was stuck here on Friday
Courtesy David Spector

So, RTD put a bus shuttle in place for passengers who needed to get to and from the airport. Crews then got to work moving the two disabled trains.

One of those trains was "resolved" by around 7 p.m. and on its way to the station, where the riders could find their salvation. But the other had to be dragged by an "operational" train, according to RTD.

So real talk: If you were trapped on this train, you'd be a little upset, right? People took to Twitter to vent about the ordeal.

Some of them made light of the situation ... at least at first ...

But as time went on, it became more dire, and people were (rightfully) upset.

And it begged the question: How would RTD compensate the passengers trapped on a train for hours when, presumably, they were either headed to the airport for a trip or from it to either return home or to explore Denver?

And what about the people who were planning on taking the A Line but couldn't?

And finally, what about the dozens of Cubs fans had traveled to see the baseball game (bless their hearts) but instead found themselves somewhere far less entertaining?

RTD says they will be refunding and replacing tickets, but that they can't provide reimbursement for other forms of transportation because they're a "taxpayer-funded entity."

It's unclear what led to the service interruption.

And, for what it's worth, if you have specific questions about what your rights and compensation are in this situation, here's what RTD asked many irate travelers to do: