its called adrenaline. youll be so pumped and focused on that deer that everything else isnt on your mind. Now im a bird hunter and this is my first year deer hunting. i wear ear plugs when bird hunting because my ears will ring, but when i shot my buck this year shootin a 2 3/4 inch sabot movin 2000fps, i dont even remember the kick or the bang. i was much more excited deer hunting then i ever am with birds thats for sure