We were at MK that day--my 40th birthday, btw--and I was waiting outside BTMRR with the baby while dh was on the ride with the bigger kids. I saw the CM at the entrance to the ride turning people away from the ride. I thought there was a problem with the ride so I walked over and asked. She informed me that the parks were closing "due to circumstances beyond their control". When pressed for details, she just said we should go back to our hotel and turn on the news.
When my family exited the ride, I met them and told them what the CM said. We headed toward the exit, thru Adventureland. Lots of people were still laughing and smiling and heading *away* from the exit. We were almost out of Adventureland when they announced over the loudspeakers that the parks were closing. By the time we got to Main St., it was wall-to-wall people, but everyone was calm. Confused, puzzled, but calm. CMs at the exit turnstyles gave everyone one day park passes as they left.
I didn't hear what had actually happened until we were walking down the exit ramp from the monorail at the TTC and some guy was walking next to me talking on his cell phone. I asked him what had happened and he told me.
We heard more details on the car radio as we drove back to our villa at the Disney Institute, then watched tv all afternoon at the villa.
We had planned to go out to dinner somewhere for my birthday, and since the restaurants at the hotels were still open, we ended up going to Juan and Only's at the Dolphin for dinner. It was completely deserted.
They did open the parks the next day; we were there until 9/22 and I've never seen the parks anywhere near as empty as they were that trip.