Five Strange Things That Happen Just Before a Person Dies.

In med school, there are some things you're not taught expressly by your professors; you only get to learn or witness them firsthand when you start your practice.
One of such things, is the strange behavior of people close to their hours of death.
As a medical worker, I've witnessed a few incidents that science cannot fully explain, some of which I'm sure other people who work in the sector have witnessed, too.
When a person is close to dying, I've witnessed situations where such people start seeing and talking to their family members who are also deceased.
You'll hear such patients having long conversations with either their spouse or sibling or parent who died a long time ago.
If you ask them who they are talking to, they'll point towards any empty corner of the room and tell you their dead brother or spouse or relation is standing or sitting there. And many times, they seem to find comfort in such moments.
I have also seen people who were totally unconscious and near death, but had to wait for their family members or a particular family member to arrive (no matter their location) before they give up. Many times, they do not even move their body or open their eyes until such family members arrive. And when they do, they'd open their eyes, have deep conversations with them and then give up shortly after.
In other cases, I've seen people who'd rather wait for their family members who have been staying with them in the hospital to leave the room before they give up.
I've seen this happen more with women!
Lastly, I have also seen people whose medical condition had totally deteriorated, but shortly before they d??, they'd appear to have a period of remarkable clarity of mind and well being; they may even for a day or two appear to be recovering and then they'd suddenly pass away.
To be honest, I have no idea why any of these things happen even though I've seen it happen over and over again.
As far as I know, science has no explanation to this. But I just somehow believe it points to the uniqueness of humanity.
And every time I get to witness any of these scenarios, I'm left with just one question: WHY?
Have you ever witnessed any of the above situation?