With bated breath
Definition 1 of 1
Pro Tip 1/3Emotional Intensity
The phrase often implies emotional investment, showing someone is deeply concerned or involved. 
She watched the election results with bated breath, fearing for the future.
Pro Tip 2/3Expectant Silence
Conveys a sense of silent anticipation, as if one is holding their breath waiting. 
The courtroom waited with bated breath as the jury returned with the verdict.
Pro Tip 3/3Not Literal
It's a figurative expression and doesn't mean someone is literally holding their breath. 
Fans waited with bated breath for the band to come on stage, their excitement palpable.