You mean the little coffin? Yeah, that's a little strange. Grace Kelly also got her fair share of abuse dring Rear Window, etc. Hitch suffered, or so I have read, from scopophilia (sp?) basically peeping tom-ism.
I had forgotten about the little coffin! I was thinking about the scene where he threw birds at her for a week, until one nearly pecked her eye out and she ran screaming from the set.