lie heavy
1. To be suspended in air in significant amounts. Smoke lay heavy in the air of the cocktail lounge.
2. Of something negative, to linger or continue to be apparent in a way that is unpleasant or oppressive. This usage usually refers to something intangible, such as a quality or feeling. Tension lay heavy in the air after Kiki made her accusation.
3. To cause strong and lingering feelings of uneasiness. The documentary lay heavy on me for days after I watched it.