Overall the experience was pleasant. However, during the bus ride back the tour guide cornered me asking for a large tip for themselves and the driver. I am a university student and was not made aware of this expense by Traveloka or the tour guide ahead of time. I agreed to provide her (the tour guide) and the driver a tip despite the fact that no one else was asked to give a tip. The tour guide made the situation even more uncomfortable when after handing her the tip money, she asked for more.