Best song in a movie moment...

[thatpfunk]

What is the best song used at a specific point in a movie?

For instance, I'm watching Goodfellas and the Cream song "Sunshine of my Love" (i think thats the title) is really freaking sick. The opening chords start blaring as Deniro stares down the camera as he's deciding to wack all the people from the heist...

I am sure this isn't even close to the best one, but I love when a really good song comes on in a movie giving the goosebump effect.