In addition to Jakarta being referred to as "The Big Durian" (you either love it or hate it!); Indonesian is after all known throughout the world as the "Spice Islands."
"Sambal" is a chili based sauce that is widely served as a condiment with meals in Indonesia. For the uninitiated or neophyte chili aficionado, these can pack quite a punch; so be careful what you eat with your rice or "nasi" here in Indonesian or what you sprinkle or spoon out over your dish. It may look like a benign condiment, but if you're not careful or weary what's on your plate or dish you could be in for a real awakening!
If you go to a U.S. franchise type of restaurant like Pizza Hut, Burger King, McDonald's, etc don't expect to be served Heinz or Delmonte style red tomato ketchup with those french fries - rather you'll be served the standard orangy "saos sambal" or chili sauce in little packets or from the self serve pump dispenser and you'll have to ask for regular tomato ketchup.