There's a line in "Gallowa Hills" - when doon fa's a' (when everything falls down).
I never really thought about it until an English friend asked what it meant: literal translation as shown, but I suppose it is suggesting falling on hard times or everything going pear- shaped for you.
However my friend had this mental picture of your trousers and pants all falling down. Since she said that, I've never been able to get through that line (which happens twice in the song) without laughing!