Wow, I never even knew about The Haunting. First I'm hearing about it. Have to go back and check it out.
Sabbath did that a lot.
Wasp/Behind The Wall Of Sleep
Bassically/N.I.B.
A Bit Of Finger/Sleeping Village
War Pigs/Luke's Wall
Jack The Stripper/Fairies Wear Boots
The Elegy/After Forever
Step Up/Lord OF This World
Deathmask/Into The Void
Wheel's Of Confusion/The Straightener
Under The Sun/Every Day Comes And Goes
Some are real (the "Bassically" intro to N.I.B., the instrumental outro Luke's Wall) some are more iffy, like The Elegy, which is basically 15 seconds of keyboard swirl. I can't even tell you what "Step Up" and "Deathmask" really are, other than the intro riff to the actual song.