Originally Posted by
klparrot
Not sure what mat you're talking about, but I'm sure encampbe was referring to the mat at the entrance to the security lines, which, when stepped on, randomly lights up either a left- or right-pointing arrow on an attached sign, directing you to either the regular security line or the line for more thorough screening. There are no wands anywhere nearby at this point.
I think hascaddy was talking about something else because that arrow mat we step on protects us from rebar in the concrete almost as much as it protects us from Niburu coming into the solar system in 2012.