When emotions become too much and often involves crying or like expressions of anger, they get upset. You started to get upset when I didn't tell you things. In British English, we don't usually say to figure something out, we say to work something out. So anyway, you were so mad when you figured it out. Here you yelled, shoving money at me. This is this American English here. For us, mad means crazy, but in American English, it also means angry,. It doesn't mean angry in British English.