Lunching with the dead

Cracked notes that "once upon a time, some director or screenwriter wanted to show the audience how desensitized to death their experienced coroner was, maybe while getting a few laughs at the same time. So they had their coroner eat something right in the middle of an autopsy, a concept that would freak out normal, squeamish people like you and me."

I believe that once upon a time was in Bride of Frankenstein (1935), and the "coroner" was the infamous Doctor Pretorious, who enjoyed a pic-a-nic in a crypt.  Can anyone think of an earlier example?

*FSL:  No evidence of eating in this Eakins below. Although there is plenty of representative psychology going on.