I don't know if this is true or not but someone told me that the reason they stopped the count was because one of the cameras froze and that someone at NASA thought the beanie cap was still on the Space Shuttle. Yikes!! I guess he was only looking at one camera and it froze up showing him just a still. I don't know. No wonder he stopped it.
That's pretty much what happened if I understood NASA TV. My co-worker was like "Uh Oh." When there was the pause and all the radio chatter about the vent cap.
I really wish I could go back in time and see at least one shuttle launch. I would have loved to be in your shoes.