He is completely off the mark with his wacky theories.

He is completely out to lunch today.

It is easy to succumb to the dark side of the Force.

It's important to look on the bright side, even in difficult times.

You have to stack the odds in your favor to succeed.

Both sides of the street are lined with trees.

The cars are parked on the sides of the road.

The sides of the road were lined with trees.

He stands next to his brother.

The birds were flying from all sides.