I had the same tune in mind, but refrained:

I found a troll. Which started the whole world crying.
But I didn't see,
That the joke was on me.

I fed the troll. Running my hands over my eyes.
And I fell out of bed. Hurting my head from things that I said.

Oh, no, I started to cry. Which started the whole world laughing.
Oh, if I'd only seen that the troll was like me.

Oh, no, the troll was like me. Oh, oh, oh, oh, oh, oh.