By now you've probably heard of the SawStop, a table saw that slams to a halt if your finger comes in contact with the blade, saving you a digit.
Well, here's a video of SawStop inventor Steve Gass running his finger into it to prove it's safe.
I don't care how safe it is, I have way too many hardwired synapses to overcome to force my finger into a rotating table saw blade. This reminds me of the first guy who ever jumped out of a plane with a parachute--I don't know who that guy is, and I'm sure they first tested the parachute out on low cliffs and stuff, but at some point some nutjob was the first guy to throw himself out of an airplane with a sheet strapped to his back. And I think he was f&@#ing crazy.
via tool crib