What is up with that trough in the Solace Sewers? I have been trying to figure that one out since 1998!
A big problem for me is you never know if you are on the right track.
You see a trough - does it do anything? No way to know, but absolutely no way to rule it out.
You've tried all the regular keywords "X trough", no good. Now you have to try all the crazy stuff you can come up with, because maybe it's "nap trough" - who knows! Perhaps an adverb got involved. Yikes! Looks like your fingers will be cramping up before you can do every combination of "X trough Y". Ugh, what if the syntax is abnormal? Nothing else worked, so you have to try all the (X Y trough and trough X Y) combinations you can think of. Now you recall that some keywords have to be entered multiple times to be successful, plus maybe you have a goblin corpse in your inventory to use for a blanket? Maybe two "blankets"? No way to know.
I guess I'd propose a spell/skill (Ex. Inspect) that allows a player to see what objects have a purpose. Once you "inspect" that trough and it glows green, by all means sit there until you get the magical "quickly nap trough" x3 (with 2 goblin corpses in your inventory) combination.
I know it's way too much work, but what would be really nice if attempts gave some kind of hint - "break trough" would give "don't you feel too sleepy for that?" anything that would give the feeling of progress.