From BBC's Planet Earth, Episode 4 "Caves":-
"At a depth of 400 metres, Mexico's Cave of Swallows is Earth's deepest pit cave
freefall drop, allowing entry by
skydivers and Pervy Abbotts. Its volume could contain New York City's
Empire State Building and 3,000 over enthusiastic Abbottiers."
"Your are here by sentenced to 6 years in Prison for the possesion of indecent metarial concerning really awful things under the legislation of 'Abbotts Law, 1999'"