Answer: Desperate
Explanation Just going off the fact where it says fat doing all these thing is desperate if you are willing to be cold but is fast you are pushing yourself to do this. Energetic from an adrenaline rush.
The word "a" would come first.
Triumphantly is an adverb, so you would be looking for the verb that it modifies. I would choose the word “pressing.” Ask yourself, “how did he press down the alarm knob?” He pressed it triumphantly.