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.
(..) Yes, well, I'm the Doppler effect. - Oh, no. - What? That's Penny's ex-boyfriend. What do you suppose he's doing here? Besides disrupting the local gravity field. If he were any bigger, he'd have moons orbiting him. Oh, snap. So, I guess we'll be leaving now. Why should we leave? (..)2007 TvShow: The Big Bang Theory Title: The Middle Earth Paradigm Season: 1 Episode 6