I spot the most disturbing Superdictionary source panel ever! (Or one of, that is.) Panel two of "how to twist a Robin's neck", that is.
There's also a second Superdictionary source in the last panel of "how to chop up a Robin".
Man, what were they thinking? "Hey, we gotta find some Robin art to put in that dictionary for kids." "Ooh, let use this panel where Robin in being hung." "Yeah, that'll work. Let's use it for the definition of promise!" "Awesome!"