What are These People Chanting?

Like Yanny vs. Laurel and the picture of the dress that came before, no one can agree on what these people are chanting. Different people hear it as: "Bart Simpson Bouncing", "Rotating Pirate Ship", "That Isn't My Receipt", "Lobsters in Motion", "That Is Embarrassing", "Lactates in Pharmacy", "I'm Chasing Martian", "Baptism Piracy" or "That Isn't Mercy". What do you hear?