Ever used the Papain (Papaya) based meat tenderizer? I should know better than experimenting when I have more than 20 people coming over, but what the heck. Among other meats, I've got 6 tri tips marinading in a mixture of soy, worsh, wine, garlic, onion, and seasoned meat tenderizer.
Munroe effect and close relatives. Franz von Baader, in 1792 or 1799, discovered the process of explosive engraving, but this could not have been explosive forming in the modern sense, because he worked with black gunpowder, the detonation velocity of which is too low for what is generally called the Munroe effect.
Spherical aberration. Spherical aberration is an optical effect observed in an optical device (lens, mirror, etc.) that occurs due to the increased refraction of light rays when they strike a lens or a reflection of light rays when they strike a mirror near its edge, in comparison with those that strike nearer the centre.