fear of the Dark, especially the live in Rio version always gets the hairs on the back of the neck up.
[video]https://www.youtube.com/watch?v=gRlsHMCSaW0[/video]
Actually Maiden are generally awesome at intros;
[video]https://www.youtube.com/watch?v=4uq6Ax-zzkQ[/video]
[video]https://www.youtube.com/watch?v=7sXPmz9b4lM[/video]
[video]https://www.youtube.com/watch?v=ZO6giM9UAv0[/video]
[video]https://www.youtube.com/watch?v=PqLAdbtfJbs[/video]