This table saw is so groundbreaking!
Usually, what happens if you touch the spinning blade of a table saw? That your finger will be cut away 
Forget that days! This blade is constantly monitored by an electronic circuit: when there is a variation on the conductivity of the material that we are cutting, DLANG! The circuit immediately stops the blade hiding it in a trapdoor in just a fraction of seconds!
Look at this video! Awesome!! Think, how many fingers can be saved by this technology!