Jack Is Curious: Do Farts Make Old People Go Faster?

Jack is cheeky and curious and lives in an old Peranakan-style house in Singapore. He is interested in all people, especially the old people. One day he hears some odd noises while going to the supermarket with Mama. Whoooosh! Prrrahhp! Bssshhh! He then sees old people zooming forward. What is happening? Mama explains he is hearing gas escaping...and that gives Jack an idea.