on the edge of one's seat

Related

nail-biting · breathless · riveting · cliffhanger · heart-pounding · anxious · exciting · captivated · engrossed · waiting · dramatic · intense · white-knuckled · leaning · forward · climax · thriller · tension

Opposites
engagement/attention

on the edge of one's seatbored

Lacking interest or engagement

bored to tears · disengaged · tuned out · zoned out · checked out

emotional arousal

on the edge of one's seatrelaxed

Free of stress

calm · unexcited · unstimulated · underwhelmed · unenthused

physical posture/body state

on the edge of one's seatslouched

Drooped in posture

slumped · reclined · kicked back · lounging · laid back

Familiarity
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