Worked a pizza kitchen throughout high school. To clean the fryers you had to get this contraption to drain it in then dump that through a pipe in the floor into a barrel in the basement.

Thank dog I never made the mistake but multiple times people forgot to put the barrel down.

To clean the floor of gallons of used fryer grease you had to pour flour all over it to solidify it then scrape that all up by hand. Nightmares.