Will I Throw Up On A Roller Coaster ?

I doubt you will throw up on the roller coaster. People usually throw up after the ride. The best way to know how the roller coaster is to think about how you feel after other experiences. For example how do you feel after spinning around many times or riding in a car for long periods of time? If you do not experience discomfort after these you will probably be fine. Everybody is different and i wouldn't eat anything too heavy before riding. You will most likely be fine, good luck.