Endlessly disturbing dental set-up aside, this old Betty Boop clip is one of the strangest things I have seen for a while. The laughing grave stones are really something, and the bridge that chuckles; "Don't make me laugh!" is too much.
As a side note, why do you suppose Betty laughs so much when her pal yells in pain, as she tangoes him around the room? I guess she is dressed for sadism.