Tony Hale is a devout Christian and is a complete retard when it comes to swearing. The script called for him to swear for about 30 seconds and he just couldn't do it.
I had this spooky psychological thing about 'The Piano' before it began, which was how everybody was going to go nuts on the set. Because a film tends to set up the way people are going to behave.
Because there is something helpless and weak and innocent - something like an infant - deep inside us all that really suffers in ways we would never permit an insect to suffer.