[Tango-L] How wide is the base of "The Lead Pyramid"?

[NANCY]

--- Jay Rabe <jayrabe at hotmail.com> wrote:

 think check steps are a better example than the
> parada/pasada. Check steps are almost impossible to
> lead quickly in open embrace without some slight
> "braking" pressure with the hand.


What is a check step in tango?   I could only find
this check step in mambo  

http://www.expertvillage.com/video/19760_mambo-dance-check-man.htm

  Altho the guy in the demo makes it look more like
the wee wee dance little kids do.  Certainly not the
mambo step I was taught in my ballroom days.

  

Nancy