Dive into Creativity: Explore, Discover, Enjoy
It's called a "call and response" and a lot of peoples brains are just hot wired to finish the other half! Think the Adams Family with the snapping, no matter what when most people hear "da da da dum" they are gonna snap or make the sound however they can to finish it!
idk if this is just an american thing, but do you guys remember when ur teacher would do this little rhythm of sounds and the children would respond with like the end notes and then they were expected to be quiet?? yeah thats what happening in this comicĀ