In what case the "Self Moved" of Event Hit could be false?


The document of Event Hit is like this:

Boolean - Used when receiving a hit from another object’s movement (if false), the directions of Hit Normal and Hit Impact Normal will be adjusted to indicate force from the other object against the object being hit.

But when I was testing, I found a cube mesh with “Simulate Physics” fell on a blueprint class would get a true(receiving a hit from another object’s movement will get false).And the same mesh moved by Matinee wouldn’t cause the event at all.And a player character will get false.

So, Dose anyone know how on earth this thing works ? Thanks.