OK, I am going to watch the whole clip again and move through it frame by frame.
---------- Post added 07-09-2011 at 07:34 PM ----------
You're right. Two beats (that I could count). Top of the head inside the hatbox.
---------- Post added 07-09-2011 at 07:49 PM ----------
OK, while advancing the clip enlarged and by single frame (I need a life), there may have been one beat of light inside the hatbox while behind the wicker screen and I counted two after the hatbox was no longer obstructed by the screen. That's three beats and would definitely sync it to the bride's heartbeat.
(Of course, I still contend that the pop-ups were, at one time, synced to the bride's heartbeat and came up on every 8th beat, or two measures, though not all together.)
So, the hatbox is flashing but the face above the shoulders is out of order. Woe is me.