The song "Whiplash" was Metallica's first single release ever in North America.

Album:
Kill 'Em All

The song live:
Partially Jason is taking over the vocals during the live performances of that song.

The single:
The single of "Whiplash" has been only released in North America.

The subject matter:
The subject matter of the song is a tribute to all their fans that supported Metallica since they started out.