Friend

I once had a friend,
whos name was Sven.
He was the greatest guy,
He always said "Hi".
One day he fell off a tree,
He shattered his knee.
He said it really hurt,
The wound was full of dirt.
So I poured acid in his knee,
I was so proud of me.
But he was very mad,
and I was very sad.
He wasn't my friend after that.