
I was thinking that too. You probably also look confident, and sure of yourself. For some reason this is Threatening to someone who isn't..
some people tend to compare how they feel on the inside, to how others look on the outside-
for instance, this guy perhaps feels like a 'loser', and then sees YOU looking all confident, and concludes that you have it all together, and he doesn't-so he gets mad ( mostly at himself) and calls you a name...
...hoping you will get mad, and lose some of your composure...
good thing you didn't. He's really not worth the energy.
( not to mention getting his blood all over your orange tank top)
well, that's a theory, anyway 
ps er..can you define emo, because I have heard conflicting definitions. (Plus I am fairly old) 
) well, if any 19 year old lasses are offering..