Is it normal that i get hard from playing 'happy wheels'?

For some reason I always seem to get a raging boner whilst playing Happy Wheels. For those of you who don't know, it's a browser-based game where you drive your character around and any mistakes result in your character having their limbs ripped off and them being mutilated and killed. For some reason, the sound of the characters screams and being torn apart and the blood and stuff really seems to turn me on :/ ! Now I get that it's a game and the graphics are terrible and it looks all cartoony and everything, and I'm sure seeing something gory like that in real life would disgust me, but it always makes me really horny! Is this normal?