Cardboard...

Guess where I found this wee piece of blue cardboard?

In Ewan's ear!

If I remember right, he said his ear felt cardboardy which was literally correct and tends to suggest that he has some sort of clue as to how it got there.  He's not admitting as much so we can't and won't ever know how it got there.

Very odd thought and I don't recognise where the distinctive type and colour of cardboard came from.