He describes the functions casinos use to keep people on a machine.. I worked armed security in a casino for years and I'm telling ya, the most depraved of people haunt them... I've dealt with desperate people, drug and alcohol addicted, theives, lost souls and the potential for them banking keeps them coming and playing...it becomes very difficult for them to leave the place with even a nickel left in their pockets. You'll see one person jackpot and it's like a drop of blood in the sea to sharks... the dopamine and adrenaline is thick for gambler, whom we called "customers". I watched on my 3rd shift for over a week's time the same person, in the same clothes, never leave a machine, practically starve themselves... Some people, if they needed to go to the restroom, the attendants would stand at the machine for them, if they needed to eat, the attendant would lock the machine for them, if they been stuffing money in like a Rockefeller... we kept busy with medical calls.. alot due to diabetics not watching their blood sugar, fights at the tables, and the occasional cardiac arrests and a few deaths at the machines, too.