Quote Originally Posted by Irving View Post
Install it on a fire extinguisher. Slice open the palm of one hand, cover the other hand in soot. Then lock tester in a room and start a fire at the other end.
That's the positive control case and I thoroughly approve of it but you also need the negative control case. Program Mr. Inventor's and only Mr. Inventor's biometrics into the gun then let hem stand 10 feet away while someone else picks up the gun, points it at Mr. Inventor, and attempts to fire it. Repeat 1000 times for statistical significance.