Thread:Humphry02/@comment-27934123-20150422084815/@comment-26102520-20150422224928

Jennifer Lee says it, my bad:

‘it’s the most emotional part of the storytelling. So we wanted to balance that visually with the chaos and silliness that’s happening along the way as the little frozen Snowgies appear with each sneeze and wreak havoc. It was like writing two shorts and putting them together.’

Your concern about them not writing the piece is valid, but it's still one source more than the lower case variant has.