Thor Must Be Nearby
To find Mjolnir, Thor’s trusty hammer, would easily make the day of any Marvel Universe fan. Usually, seeing Mjolnir means Thor must be somewhere near; maybe he dropped it to go get his daily workout in before restoring the balance of the universe.
However, according to Norse mythology, if a regular person tries to lift the most fearsome and powerful hammer in existence, they would probably fall over on their butt. That’s perhaps why the Thor challenge was invented; you would need a lot of practice lifting weights like you would raise a hammer before you attempt to wield the sacred tool.