someone knocking on my door

What would you do if you hear someone knocking at your door and you are just the only one stay inside house??
 scream like bitch?
 get a knife and prepare yourself for whatever comes next?
 answer the door and ask what he may need?
faint??
 wakakaka...
Im damn scare about it...
 I ill quickly hide in my blanket!!!!!!
keep silent, and close my eyes up...........

arrrghhh..

I can't imagine if one day....
someone looks like  him there knocking on my door!!!

warrrghhhh!!!
faint