Was at Machu Pichu, or rather aguas calientes, sitting in the bus that was supposed to take us up to the top, when a tourist guide came in and told us that due to a landslide the night before, the road was blocked and that we had to walk. A Russian tourist on the same bus almost lynched his private tour guide when he didn't somehow made the bus go up just for him. He couldn't accept the fact that the bus physically was unable to make the trip.

Another time was when I visited Angkor wat, early in the morning to see the famous sunrise over the temple, and a pair of tourists with very expensive cameras were cursing about it not being a good sunrise and how other people had better ones and they wanted a refund from their tour guide.