You could retrieve the key from her relatively easily with an excuse about having lost your set and vague promises to get new ones cut that never appear.

Jump pads are often required for getting past certain obstacles or reaching a ledge to retrieve a key, etc.

This was always won as the strongest swimmer would retrieve the key.

The adventurers had to untie this and then retrieve the key that was at the end.

In the second round, the four castaways would use a stick to retrieve a key suspended above on a metal spring.