Answer the question about text:

I had a really weird few days . Yesterday , I ate lunch , got some errands done ( including mailing something awesome to Martin ; I hope it gets there unsmooshed ) , and went to a cafe downtown to do some journalism reading . I ordered one of those flavored blended espresso drinks . I do n't know what was in that drink ( probably just caffeine and sugar , but still ) , but it hit me hard . I was SO INCREDIBLY EXCITED about everything I was reading in my journalism textbook , I had trouble focusing because I wanted to get up and dance around going " Squeeeeeeeeeeee ! "

What about the drink led the speaker to have such a strong reaction ?
They were n't used to consuming so much caffeine in such a short amount of time , and this is why