[AtlUmpSteve]

Then it is no worse than any other call with a line; you call what you can see, you don't call what you aren't in position to see.

It is possible a base umpire, from any position, could clearly see the foot landing completely outside the line; just as a base umpire can call a swing from the wrong side. All I'm saying is that if they want it called consistently, then they need to use all the eyes available. We all know how impossible it is to expect a consistent strike zone on pitchers throwing 60+ with movement, when we are told to look at pitcher's feet and batter's feet all within that half second (60 mph = 88 feet per second).