They didn't seem to understand the 'gravity' [='seriousness'] of the situation.
He uttered the oath with proper 'gravity'. [='solemnity']
Its low 'center of gravity' makes the car very stable.
(..) Show me. This is a sparring program ... ... similar to the programmed reality of the Matrix. It has the same basic rules. Like gravity. These rules are no different than those of a computer system. Some of them can be bent. Others can be broken. Understand? (..)1999 The Matrix