It's a complaint heard the world over: when tourists come to a foreign country and don't pay enough attention to the sensitivities of the local people, unnecessary conflict can ensue. Usually these problems are ironed out amicably, but sometimes they lead to physical violence. And when that happens at the 7,470-metre mark on the world's highest mountain, then it's clearly a serious matter.
On Monday, the BBC reported an incident on Mount Everest involving European mountaineers Ueli Steck and Simone Moro, and their Nepalese Sherpa guides, which resulted in an angry confrontation allegedly involving stone-throwing and murder threats.
Police are investigating, and there are different accounts from the two sides. The Sherpas say the Europeans were climbing too fast and triggered an ice fall, while the Europeans say the Sherpas were reacting to a loss of face because they were being outpaced in the climb. Mr Steck told the BBC that the incident was related to a long-term problem of "cultures".
If you are a guest in a foreign land, challenges will inevitably arise, but things can almost always be resolved if you demonstrate an understanding of, and respect for, the traditions of the indigenous people. And when they're carrying your oxygen, you might want to be extra nice.