The Vicar / Priest

Has anyone noticed the peculiar noise that the vicar / priest makes when the Mannequin lands on him at the beginning at the shopping centre. I always rewind it as it amuses me so much.
Plus, I always find it weird the way a set of walkie talkies seems to be such a fundamental part of the criminals plans. I'm sure there were other things to worry about of greater importance.
I also never understand the way the overweight kid makes so many appearances throughout.