Best album opening song?

Falkenbach - ...When Gjallarhorn Will Sound...
Dawn - The Knell and the World
Arch Enemy - Enemy Within
In Extremo - Ai Vis Lo Lop
Lacuna Coil - Swamped
Opeth - The Moor
Opeth - Windowpane
Summoning - Rhun
Naglfar - Horn Crowned Majesty
 
In no order

Metallica - Blackened
Metallica - Battery
Slayer - Angel Of Death
Death - Symbolic
Death - Overactive Imagination
Death - Scavenger Of Human Sorrow
Nevermore - Narcosynthesis
Coroner - Die By My Hand
Morbid Angel - Rapture
Soilwork - Follow The Hollow
Megadeth - Holy Wars....The Punishment Due
Kreator - When The Sun Burns Red
Dark Tranquillity - Final Resistance
Arch Enemy - Enemy Within
Terror 2000 - Back With Attack
 
What about Mortician - Stab? (Chainsaw Dismemberment)

I mean, it's easily the best song on that album. Not that the rest of it isn't awesome, it's just that Stab has THE best sample at the start; the long drawn out pauses really get the pulse racing, and then it kicks-in with their most powerful and unique songwriting moments; blowing everything away and establishing the intensity and speed that the rest of the album will follow with. It almost isn't even like a Mortician song, it's more like a bastard offspring of early Deicide and later Gravedigger, with the added electronic sensibility of Fear Factory and the progressive sense of Neurosis, surely it's an opener that is not only one of the greatest openers ever, but one of the very best metal tracks ever recorded. An all-time classic, and a song that is absolutely unspectacular and COULD HAVE BEEN PUT ANYWHERE ON ANY ALBUM AND GONE TOTALLY UNNOTICED.
 
Megadeth - Holy Wars
Megadeth - Wake up Dead
Metallica - Blackened
Metallica - Battery
Arch Enemy - Enemy Within
Fear Factory - Demanufacture

(I'm sure there's more that I can't think of right now)