If someone's wearing a smart-watch and you scare them, you can measure your scare efficiency by their heartrate. Go for a highscore!

mathemachristian , 8 months ago

Efficacy*

antizero99 , 8 months ago

Not really. Efficiency does work and so would effectiveness.

Psaldorn , 8 months ago

The highest of scores would be 0

li10 , 8 months ago

I’ve only ever gotten a heart rate notification while watching an MMA fight and seeing someone getting KTFOd

metallic_z3r0 , 8 months ago

I think a high score might mean fibrillation depending on the runner, so please be choosy with your scare victim.