My father died in 2013. This is not a completely strange phenomenon; people die every day. Millions of other people are probably experiencing the same thing right now.
But consider the factors:
My parents were divorced. The way my father died. When was the last time I talked to him before he passed. I am the youngest of two sons. I was transitioning between junior and senior year of high school.
Those are just a handful of factors that set the situation apart. Now, consider the fact that everyone in the scenario is a completely different individual who is wholly unique in their own way - to the point where there will never be anyone like them again.
When you experience something, you are experiencing a once in a lifetime moment. You and only you can express the emotions of that specific situation from your perspective.
This is what makes dance powerful. It puts into motion emotions that will never be felt again.