Monty Python - The Holy Hand Grenade of Antioch with Instructions T-Shirt at for $19.99 + free shipping
This shirt is full price, BUT until Friday they have free shipping on orders of $14.99 or more.
Reviews for the shirts are great - well made -quality construction and material -great color
The front has the Antioch Grenade art and says "O LORD, bless this Thy hand grenade that with it Thou mayest blow Thine enemies to tiny bits, in Thy mercy."
The back actually has the full instructions for the Grenade which are too long to post here.
They also have some other really cool Holy Grail shirts for sale.