Probably the setup to record the sound in the oxy mask has accentuated the 'heavy breathing'. Breathing fast? Sure. But if she has just arrested for the first time in an F-14 - to then catapult subsequently - I'll wager anyone's heart will be racing. No fear - JUST DO IT!
I could regale you with my first ever catapult after my first ever arrest in an A4G (we had no luxury of training aircraft on training carriers etc.). I was catatonic. Are you kiddin' me. Looking down that 105 foot cat track for the first time on high over the nosewheel of an A4G - for fsake. And after my first shipboard arrest - I was frazzled to say the least.
Then came that almighty closed fist punch to the chest and home I went - not just speechless but breathless to boot. At last I was a fully fledged Navy Pilot (we did not say naval aviator then) in the RAN (after graduating with pilot wings years earlier from the RAAF training system of the day).