(Vex, vex. I had almost all of this posting put together when — despite automatic saving in WordPress — most of the file vanished, so I had to reconstruct almost everything, including the links, from scratch. Sigh.)
Yesterday’s Calvin and Hobbes from the past:
Two different intransitive verbs bite here: one in panels 2 and 3, another in Hobbes’s question in panel 4. The first is straightforward transitive bite with omitted direct object (yielding one type of intransitive). The second — “[no obj.] (of a fish) take the bait or lure on the end of a fishing line into the mouth” (NOAD2) — seems to be more complicated, but its historical source seems pretty clearly to involve a semantic extension, from a verb referring to using the teeth to cut into something in order to eat it to one referring merely to taking something into the mouth in order to eat it.