What is this in my body ?

This "chilly,rushing but awesome ! " feeling i get through my blood.The most common way it happens is when the most dramatic scenes in the movie happens,i get so happy and that chilly feeling just comes 2 me.I'm not that dumb,I'm sure its Cortisol , but CORRECT ME IF I'M WRONG,and I'm just worried about any risks i can get,since i Love watching movies !