Sandford and son season 2 episode 1 "The Light Housekeeper"-- Lamont and Fred are at the dinner table, if you notice Lamont brings out 4 pieces of toast, most are burnt. Over the course of the next 4 minutes, the count goes down to 2 pieces of toast, but neither one are eating. You can tell the toast goes down, because the top piece is no longer burnt black.