Omg! How scary that must have been for you, I would have panicked so much and called the ambulance immediately or taken him to the hospital during the night. I'm glad he's ok now.

Don’t let them stand up too fast

I was told it's equally important not to get out of bed too fast in the morning. Instead you should always turn to one side and slowly get up. Something to do with the blood pressure or the blood getting to the head too fast. You'll probably know better than me. I just know sudden quick movements is always not too good.

Take good care of your king