upside down

hi, on one of my plants the leaves is trying to turn upside down. any thoughts on this?

The Best of Ask Ed: The PLANTS ARE TURNING the leaves as a reaction to stress. By turning sideways they minimize the amount of light they receive, so they require less water and nutrients and absorb less heat. Perhaps the containers are to small. As a result the root systems cannot supply the leaves with enough water. Repot the plants.

thanks sensi super s i'll try repoting.