I did n't have a swizzle stick , so I first drank it as is , and it was pure black coffee ( not bad , but bitter nonetheless ) . Anyway , blitz and I soon got to playing , drinking our coffee / coffee - based drinks as we did . At a certain point while playing , I felt my heart murmur . And I finally realized what may be the true culprit behind it all : caffeine . When I last visited my uncle , he asked me if I drank coffee , and I answered no . I only have coffee very , very , very rarely , which is why we ruled it out at the time . But there I was having a large glass of it .

Question: What other drink would the narrator never have ?
Answer: Coca - ColaSpriteorange juicemilk