Its certainly unsual and I have not come across it. A temporary episode that lasts about 30 seconds, such as the above, could fit with a seizure - unless this episode was captured on the EEG while it was running, the EEG would be normal.
If an episode is triggerred by an emotion or event, then you may be describing catalepsy, a component of narcolepsy, a disorder of extreme sleepiness. You would also have daytime sleepiness, and perhaps hallucinations goign to sleep, a feeling of paralysis lying in bed.
Evaluation of your EKG and heart rhytm during these episodes is important also. Recording an episode with EEG, video, and a tilt table may reveal some answer - then a seizure and cardiac cause could be evlauted in the same test.
Good luck