From the brains behind brains on, this is the moment of um.

Answering those questions that make you go.

Moment of um um comes to you from APM Studios. I'm Anna Weggle.

Let's say it's Friday at 3 p.m. You just got home from school and you're so excited because you get to go to a sleepover at your best friend's house tonight.

The clock is ticking so slowly because you have to wait until 4 p.m. until your mom drives you over there. Okay, it's 4 p.m. It's time to go. Wow, that was the slowest hour of your entire life.

You get to your friends at 4.15 and you are having so much fun. The pizza and popcorn are flying.

You're laughing with your friend. You put on a movie. But wait.

Why are you so tired?

You look over at the clock on the wall and

it's 11.30 p.m.

But you just got there. What happened?

Hi, my name is Hannah and I'm from Phoenix, Arizona.

And my question is, why does time fly when you're having fun?

That's such a great question, and it's something that I experience all the time.

Hi, so my name's Ruth Ogden. I'm a lecturer in psychology, and I am interested in how people

experience the passage of time in their daily lives.

So I would say that time flies when you're having fun for a couple of different reasons.

So one is that when we're having fun, we tend to get very excited. So we experience different

emotions. We might breathe a little bit more quickly, we might sweat a little bit more.

And one of the things that we know about time is that how we experience it in the brain,

so how our brain processes time, is influenced by emotion.

So for all our other senses, for touch and taste and smell and hearing and vision,

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