There is one story that many flushers in London like to recount. It concerns a fat iceberg that had been building up below Leicester Square over the course of a whole decade. Eventually, this 150-square-foot "slug of hardened fat" grew so large that it was impassable. A gang of flushers armed with supersucker machines spent six weeks one blazing summer trying to dislodge it. By the time they finished they were reduced to using ice picks to hack away at the white mountain.
"It looks like a huge packet of lard. It shines in the dark and gives off this phenomenal transparent heat. Within ten minutes, as soon as you stick a shovel in it, you could slide through. The water comes at you like a dyke. The risks are colossal. Later, an animal food company got in touch because they wanted to buy and recirculate the fat."