36 year old horse during narcolepsy attack.

My TB x Connie during one of his narcoleptic stages middle of 2014. He was previously watching his friends over the door waiting for dinner - he went in to the back of his stable and went Three times (you see the beginning of the second & third in this video) immediately afterwards, he perked up and walked back to the door and shouted for his best friend, then carried on eating. This was caught on a second video. He has occasional narcoleptic episodes, in which he will be doing every-day activities, and suddenly drop. He doesn't always land on the floor, depending where he is. He has a couple of known 'triggers' which we seek to avoid at all costs. He's been seen to go whilst in mid-trot, though his episodes are infrequent at present. He has also had one seizure, has PPID and has melanoma - amongst other issues. Sleep dep has been ruled out entirely by four different vets. Typical after all our research, one of mine develops it! :( - UPDATE - Sadly I lost my boy aged 41, on the 25th January