Some people are always early. Others treat deadlines like polite suggestions. This week on The Unscientific Method, Tom and Mtha test the science of the brain’s internal clock to find out whether punctual people are actually better at feeling time pass.

The challenge is simple: shout “STOP” when they think 30 seconds has passed. The twist? They each have to complete distracting tasks while the clock is ticking. Will Tom’s legendary punctuality hold up under pressure, or will Mtha prove that time is just a vibe?