It's a long story.

[And not one he's sure to tell, not that he can right now, anyway. Light's focus is solely on the goose and the path it takes, and he falls into step beside Mont at the same safe distance away.]

But I don't know. I woke up and it was just there, digging its beak through the things in my room. I tried to stop it but it ran off.

[Honestly, if he had been more prepared, if he hadn't just woken up and didn't even have any shoes on...]

I didn't think a goose would be so good at breaking and entering, but I was wrong.