Inigo sees another boat in the distance following them.
Vizzini: Probably some local fisherman out for a pleasure cruise at night through eel-infested waters.
Butterquack jumps into the water.
Vizzini: Do you know what that sound is, Highness? Those are the shrieking eels. If you don’t believe me, just wait. They always grow louder when they’re about to feed on human flesh.
Fezzik rescues Butterquack from the eels and pulls her back into the boat.