Holy Hand Grenade of Antioch

The Holy Hand Grenade of Antioch is the weapon used in Monty Python and the Holy Grail to destroy a killer rabbit. The instructions for its use are in the holy book of Armaments. Particularly important is the counting to three after the pulling of the pin (complicated by King Arthur's mental block on counting).

The book Armaments, Chapter Two, Verses 9 to 21:

"And Saint Atila raised the hand grenade up on high, saying, 'Oh, Lord, bless this thy hand grenade that with it thou mayest blow thy enemies to tiny bits, in thy mercy.' And the Lord did grin, and people did feast upon the lambs, and sloths, and carp, and anchovies, and orangutans, and breakfast cereals, and fruit bats, and large (...) And the Lord spake, saying, 'First shalt thou take out the Holy Pin. Then, shalt thou count to three, no more, no less. Three shalt be the number thou shalt count, and the number of the counting shalt be three. Four shalt thou not count, nor either count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached, then lobbest thou thy Holy Hand Grenade of Antioch towards thou foe, who being naughty in my sight, shall snuff it. Amen."

The holy hand grenade is also a weapon in the computer game of Worms.