We recently stayed 6 nights in Sanur where Miss 20 who is a student(only her 2nd visit) became good friends with one of the beach sellers. After moving to Legian she decided to get a taxi over to Sanur to hang out on the beach with him. After giving good advise re only using blue bird taxi's and getting the name and number of the taxi off she went. She came back 5 hours later with our Sanur driver poorer but with a good tale to tell.
She got a great taxi driver she said he practiced his English all the way there. He even had her writing down how to spell the words and they laughed the whole trip. Getting out she gave him what she thought was 100,000rup (2 x 50,000) for the 72,000 trip and told him to keep the change. Only later she realised that she had been given 100,000 notes this time and she had given him 200,000 instead. He ended up getting a $18 tip for a $10 fare. We all laughed and hoped it made his day. She in future checked the notes she used. A good lesson learned :)