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Hey, guys! Hello, Mindy. Ready for another show? Mindy, you are going to love what I

have in store for you today. Kairaz, the last time you said that, you pulled a hard-boiled

egg out of your pocket. I remember that. I think that you cracked that on your forehead.

That was awesome. Well, what do you have for me this time? Well, Mindy, on this episode,

I planned to take you into my gravitational force machine. I'll bring my own seatbelt,

and Kairaz, I plan to pummel you with water balloons. Yeah, I'm going to take a pass on that one.

Do it yourself. Let's get this party started. Let's do it.

Two, three. Kairaz, why are you running in place? Oh, hey, Mindy. I'm just going for a jog here.

Just trying out my new running shoes. Yeah, I can see that. It looks like you got yourself a pair

of those five toad deals. Kind of make your feet look like foot fingers. Why don't you just stick

with regular shoes? You know, Mindy, I was wearing regular running shoes, but my shoe laces kept

getting untied, and I would have to stop and tie my laces again. So, you know, I thought,

well, I could just slip into these shoes with no laces. Or, a light pack, you can just tie them

tighter like everyone else. I'll even do it for you. Well, surprisingly, Mindy, over time,

it doesn't matter how tight you tie those shoelaces because if you run in them, they will eventually

become undone. Man, how does that happen? Well, Mindy, that was the very same question, a team of

mechanical engineers at the University of California in Berkeley asked. And they wanted to know why

shoelaces become untied. Tie them out! So, just to be clear, a mechanical engineer is the type of

engineer that works with machines, not the type that operates a train, right? Yes, exactly. A

mechanical engineer is a scientist that works on designing and creating and operating and understanding

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