If you are prone to vertigo, don't watch. If you aren't prone to vertigo, this may give it to you.
This point-of-view video shows the spire being hoisted atop the new One World Trade Center tower last week, capping the building at 1,776 feet.
Skip to the 7:20 point or so to see the moment it reaches the top - and the four iron workers all the way up there charged with fitting it in place.
Here's another edit that shows the moments it reaches the end of the line:
Here'e the conventional view of the lifting: