She is 'racing against the clock' to be sure the assignment is handed in on time.
Her mind was 'racing'. [=she had many thoughts going quickly through her mind]
Researchers are 'racing (against time)' to find a cure.
(..) two Pringles hugging. - No, you don't. - I'm Miss ''Hyper-Competitive.'' It used to be a big problem for me. Used to. Past tense. Are we racing? Yes! I'm not that desperate. No! You do a lot of cardio? Oh, yes. (..)2001 TvShow: Scrubs Title: My First Day Season: 1 Episode 1