The bear stood up and balanced himself on his rear legs.

When seen from behind, the rear legs are straight and not too close together.

The left rear leg was gone, obviously the one on the floor by the wall.

Something was wrong with his rear legs; he couldn't feel them.

It also has slightly more rear leg and shoulder room.

Over the next few months it will begin to affect the other rear leg.

The horse was holding one of its rear legs off the ground.

They have four long rear legs and two short front ones.

Finally the rear legs gave, and the nightmare fell on its side.

He leaned way back this time, until the chair was on its rear legs.