Update: Tonight I found three villagers stucks by the black vine. Their actions read: Fishing; Telling a story; and Arguing! I was wondering who the third guy was arguing with... the guy "fishing" --- there's an obvious argument since he wasn't fishing, but was actually stuck twitching back and forth at the vine; Or whether he was arguing with the guy telling the story!
Guess we'll never know, but it was a little humurous.