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Saw Stop - This guy puts a finger into an active table saw blade & comes away without a scratch!

Anthony Prezutti Comedy Mentalist · 12.1M views · 2012-04-05 · 5:14

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Overview

A short clip showing a person touching an active table saw blade with a finger and walking away unharmed, thanks to SawStop's system that stops the blade within milliseconds of skin contact.

On Hacker News

Linked as the canonical demo of a safety technology that stops a blade before it injures a finger.

Recommended by 2 HN people across 2 months · HN mentions 2015–2018

Topics

Woodworking, metalworking & workshop skillsEngineering & making (other)
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sawstoptable sawsafety engineeringwoodworkingdemo

What people said

nickpsecurity · 2016-12 · Strong recommendation

Case in point: [VIDEO] Maybe we need to use your sharp tools point with that video. It drives the point home with even experienced people losing fingers to their tools followed by tech modified to prevent it. The demo also never gets old. Just too badass.

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toothbrush · 2015-05 · Recommendation

Wow, that's super neat, i'd never heard of it. Seems like something that should be absolutely mandatory for all factories equipped with such devices! Go technology! Here's a demonstration, it's very fluffy but it gets the point across. [VIDEO]

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ljf · 2018-11 · Reference

/some/ power saws can stop instantly - if you try and touch this one with a finger it will stop before it can do damage: [VIDEO]

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Sources

Video by Anthony Prezutti Comedy Mentalist, played through YouTube.

Data and selection notes

HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.

HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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