| My experience at this airport was horrible. My family and I were in transit from Oslo to Frankfurt, then Houston. Our flight from Oslo had already departed late (without any prior notice given), so we were in kind of a rush. Upon reaching one of the checkpoints, we saw that there was almost no one in front of us, so we snaked quickly through the line. At one point, I ducked underneath one of the cloth belts (the ones they use with metal poles to divide up the lines) to get to the booths more quickly and hardly realized that one of these cloth dividers had come loose. As I reached the end, one of the employees in the booths, a young man in maybe his late twenties, yelled to me. When I turned to him, he yelled, "Why didn't you listen? Close it!" I genuinely hadn't heard him, so I apologized. However, I couldn't understand what he was asking me to do. My family and I really needed to get to our gate, so I asked, a little roughly, if I could please just go through. My family and I were all very jetlagged and just plain exhausted. The guard yelled at me, "Go close it!" and I realized, finally, that he was referring to the cloth belt that had come undone. His request, if I might add, was a little ridiculous. There were few people behind us (our flight was in the morning) and we really needed to get to our gate. He made me go all the way over to where the cloth belt had come loose and, pointing at it, said, "Close it!" I did, all while other travelers and employees watched and did nothing. I said to him, "Please, sir, my family is waiting for me," but he refused to let me go through until I completed this task. When I was back at the booth, the man took his sweet time looking through my passport and then proceeded to ask if one of my stamps (from May 2018) indicated my last port of entry into Europe. While I do have a lot of stamps, even a quick look at my passport would indicate that I had entered the country just earlier in December. The other stamp was from a previous trip and my return to the United States (my native country) was clearly indicated. After stamping my passport, he handed it to me and said, "Next time, you don't do what I say, you're gonna get in trouble." Yes, I understand that I need to obey airport employees. However, I tried to be respectful toward this man, ask for clarification after genuinely not hearing him, and he was completely disrespectful, humiliating me and almost making me miss my flight. When I finally did get to my gate, there were multiple lines to get onboard the flight, all kind of intertwined with one another and just a big mess. All the while, none of the airport employees gave us proper directions or more information about what was going on with our flight. That flight left slightly late, too. Back in 2016, I was in transit in Frankfurt and actually had a pleasant experience. However, my experience this past month, in particular with the aforementioned employee, was so humiliating that I will make an effort, the next time I am transiting through a European airport, to avoid this one at all costs.