When the circus made you cry

I threw my knives at you
as soon as you walked through the door
I had been polishing them all day
so absorbed I forgot what they were for

I had a whole day to practise
to wage the war within my mind
You had no idea
what you would come home to find

Now your tears rust my blades
my aim was too true
No words can fill the wound
now it is the door that I exit through