Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.

Someone helplessly watches him go, unlocking the cage.
Bowing his head, someone shuffles back a few steps, then heads inside.

He demonstrates some of the correct moves to properly roller skate.
A man talks about the best practices to prepare to roller skate.

He throws a javelin into the air.
A man is standing on a track and field.