I believe there is a portal that connects Heaven and Earth.
When a miracle happens, the portal is opened and heavenly things are poured onto us.

I think the portal can be anywhere where Holy Spirit is.
Like Jacob, I dream about the opening portal in my bed every night.

Then he dreamed, and behold, a ladder was set up on the earth, and its top reached to heaven, and there the angels of God were ascending and descending on it.