Breaking Bricks at this Kung Fu Club..Whats the Story?

Check out this

http://www.mingchuan.ie/

This is an Irish based Kung Fu club, and they specialise
in breaking bricks, and iron hand...

How before we all trumpet" Bricks don't hit back"

I am curious about this Iron Hand stuff?

If someone can break a pile of bricks..and say they hit
someone with such a conditioned hand, would it be deadly or what?

Has anyone any experience of this? Whats it all about?

I did a little bit of breaking in Tae Kwon Do years back, just boards,
but i think a kid could break boards if taught properly.