Why I get a weird feeling when playing

(Pls ignore my bad english) So whenever I play dark soul 1 i get a weird feeling of tension. My heart start pumping my hands are shaking etc etc.I do not hate this feeling but it's kinda weird that it never happened before any other game.It first happening in dark soul 3 (never play in chronological order) when i defeated the first boss the same thing start happening but when I fought Pontiff Sulyvahn my leg and hands are shaking.i kinda love that feeling but i have to quit that game for some reason.

Idk what it is but i kinda wanna does other people get this feeling?