He trains his biceps at the gym every day.

He ate half of the pizza.

He rolled the dice, but it came up odd.

I ate half of the pizza.

He told me the whole story of the incident.

He left the room walking backwards.

He became the shield for that project.

Don't stick your head out.

The splenius cervicis muscle is a part of the neck muscles, helping to pull the head back.

The multifidus cervicis muscle is a part of the neck muscles, playing a role in supporting the head.