I hate to be the turd in the punch bowl, but it looked as if that door experienced some kind of stroke or seizure or something. The excitement probably set it off. They should keep an eye on it.
We had a dog that would zone out occasionally for no reason. She usually took about 20 minutes to recover. When she got old, she had one she never recovered from.
A vet put my dog on a heart medication. After he was on it for awhile he started having seizures. The effect would last for a few days though the seizures themselves were only for a few seconds. Another vet took him off the heart meds and told us the meds were worse for him than the heart condition. He hasn’t had a seizure yet.
By the way, for major vet work such as teeth cleaning, we make a 10 hour drive to a vet we can trust. He’s cheaper than Houston vets that the difference pays for the trip.