In ancient story, the thunder god Thor represents strength, power, but also can be deceived. A king gave Thor three tests.
First, he asked Thor to finish drinking wine in the horn.
Second, Thor was told to lift up a big cat's paw.
Third, Thor would fight with an old lady.
All of the tests above were failed, now the King revealed the answers,
1) the horn he drunk with was set into the sea, the sea can never be finished
2) the paw he left up was the foot of his own, how can lift up own feet from the earth
3) the old woman was old age, who can defeat the old age, even the god
- from the Clash of the Gods