In 5e, time stop says time stops for other creatures. What all is affected by the spell? Is gravity affected? Air movement? I know that the spell only does what it says, and nothing else, but just wondering. 

In addition, is it saying that the other creatures were not affected by things? So per se, If a wind would blow really hard at one of the creatures you're fighting, would it affect the time stop foe? If you were to place a bear trap behind the person, and a hard wind blew enough to tip them, would they then fall over onto the bear trap and be damaged without the spell ending?

This is a very curious spell...