If I want to provide such options for the adventurers, I will e.g. place their dead predecessors, i.e. a previous adventuring party or similar in the dungeon. But I would probably not just put them in any hallway for the PCs to loot. They need to work for it. I imagine e.g. a big pit trap with stakes at the bottom and at the walls. An adventurer might have fallen and is halfway down, his skeleton still hanging from one of the stakes, most of his gear rotten or clinging to his body, some (more precious things) at the bottom, but the party can already see a glinting flask in a loose net from his belt hanging precariously in mid-air.
A simple 5RD encounter.
1 (Access & Guardian): Problem = need healing. Option = Healing available but dangerous.
2 (Roleplaying or Puzzle): How to get the flask. Maybe climbing down with the spikes?
3 (Trick or Setback): The stakes may be brittle. Maybe the vibrations from the climbing or loose falling stones or a falling stake is enough to make the net shake precariously almost slipping from the belt. If it drops, the potion is gone.
4 (climax): An ooze creature could be lurking there (making the stakes brittle or using acid to dissolve the clumsy climber).
Or the climber might detect a small cave within the pit. What is behind?
Or some big spider nested on the other side seemingly sleeping. Undisturbed by the climbing down, it might stir once the glinting flask is moved and light reflects from it towards the spider. The danger is not only to climb back up in time, and not plummeting down, but also to avoid the approaching spider. And if you want to make it more interesting for everyone, the spider could have sitten ontop of the latch that held the trap stone in place. Thus, once the spider moves, the pit is slowly closing. It gets quickly dark in the pit. The others (probably waiting above) might not be able to shoot at the spider due to cover. They need to think quickly whether to help their friend by climbing after, or how to prevent the pit from closing.
5 (reward and revelation): In case you choose that big spider, the reward should be likewise big. A useful magical item in addition to the healing potion(s)? Maybe something like a repellent potion that protects the party several times from creatures approaching them during their rest? And there might be clues to the identity of the adventurer, his/her party and why they chose to adventure into this dungeon.
If it was the thief climbing down, he/she might still be clinging on to quite a full bag of coins or a map. Maybe they wanted to find / stop sth. specific which was only alluded to in the current campaign.
Or maybe it is a relative of some NPC the party met before. A ring, family crest, family letter or the like could give that clue. Thus, the party might want to retrace their steps afterwards to go back to that NPC to tell about the death of this family member or retrieve information about his/her mission.
Or the climber could even have a letter from the king / baron / someone important agreeing to a specific reward after the bearer of the letter brings back [Item/Person/...], even though the former adventuring party was maybe killed, this party now could reap the rewards.
Hope that helps.
