Def. not unique to KFC...unfortunately for our guts all restaurant deep fryers look like that when they're drained. Only thing worse is the grease-trap...holy hell are those things disgusting, you'd never think anything could smell that horrible.
You think grease traps in a resturant are terrible?? Try one in a taxidermy lab or off of an autopsy table!!!! Clear a city block faster than TNT.
TB