I've seen that part wherein Sandra did crossed the border. The camera angle was from the watcher's post. Media personalities were at the right side of the stage. Sandra A. was asked by her crew to move back a little bit to show how many people were watching and at the same time FPJ. That's where she stepped into limelight and by wearing a red blouse that could really attract attention, people were looking at her instead of listening to FPJ's speech.
From what I've seen Sandra did entered the stage about half a meter away from where they should be standing at. That's wht triggered FPJ's madness and asked if she wants to deliver the speech instead. Much of their buzz, apologies were exchanged at the back stage. But still the presidentiable wannabe was still mad about it.