I'm genuinely terrified of generic face masks?

I was playing the game cathrine on my ps3 and one of the bosses is shafow vincent. Its a generic face like the dance group with the white face masks, jabowokee or whatever. I freaked out. Like, i couldnt play anymore. I then tried to tell my fiance that ot was like the dance group and found a pic which also scared me. Then i went to bed and was afraid to have my back to open spaces because i couldnt stop thinking about it. I dont underatand why im so afraid of the generic face look. Im wondering if this is normal? And what the reaaonjng woild be.