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Testing What Happens If You Jump On A Moving Train

2025-04-12 Science & Technology
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Mark Rober
Mark Rober
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Description

Sometimes you gotta go full Tom Cruise to really teach the science. Now go grow your brain even more and get 2 FREE boxes at: https://crunchlabs.com/HotAirBalloon Get your CrunchLabs box today: Build Box for kids click here: https://crunchlabs.com/HotAirBalloon Hack Pack for teens and adults click here: https://crunchlabs.com/HotAirBalloonHP Thanks to these folks for providing some of the music in the video: Ponder- @Pondermusic Laura Shigihara - @supershigi Andrew Applepie - https://soundcloud.com/andrewapplepie Blue Wednesday - https://soundcloud.com/bluewednesday Danijel Zambo - https://open.spotify.com/intl-de/artist/1ZD9ri2wmZZPL4qs92sXZX?si=iI7jkn-qSY-6NKo931314Q PLATINUM TICKET INSTANT WIN GAME NO PURCHASE NECESSARY. Promotion starts on 06/1/2024 & ends on 05/31/25, subject to monthly entry deadlines. Open to legal residents of the 50 U.S. & D.C., 18+. 1 prize per month: each month is its own separate promotion. For the first 2-3 months, winner may be notified via phone call instead of winning game piece. If a monthly prize is unclaimed/forfeited, it will be awarded via 2nd chance drawing. See Official Rules at crunchlabs.com/sweepstakes for full details on eligibility requirements, how to enter, free method of entry, prize claim procedure, prize description and limitations. Void where prohibited. PLATINUM DIPLOMA SWEEPSTAKES NO PURCHASE NECESSARY. Ends 4/30/25, Open to legal residents of the 50 U.S. & D.C., 14+. Visit https://www.crunchlabs.com/pages/crunchlabs-hack-pack-platinum-diploma-sweepstakes for Official Rules including full details on eligibility requirements, how to enter, entry periods, free method of entry, entry limits, prize claim procedure, prize description and limitations. Void where prohibited.

Top Comments (10)

@GryphonicDesign 2025-04-12

I was a hot air balloon crew chief for a number of years. In addition to the weather reports, we'll also send up our own small helium balloons (piballs) before and during the flight to get a real-time observation of the wind at different altitudes.

6.1k 40 replies
@Adam-Winrich 2025-04-12

That was me cracking the whip!

4.2k 48 replies
@fifafantic1478 2025-04-13

I have been watching Mark since I was 12. Now as an engineer myself when I am able to answer his questions before him I really felt I have grown up. Thanks Mark for contributing in developing my engineering brain

2.3k 20 replies
@MarkRober 2025-04-12

Sometimes you gotta go full Tom Cruise to really teach the science. Now go grow your brain even more and get 2 FREE boxes at: https://crunchlabs.com/HotAirBalloon

2.1k 151 replies
@gomarky 2025-04-12

Getting major Myhtbusters flashbacks with a couple parts of this video. Not a knock, more like reminiscing as I see the sync'd pendulum and the plane on the treadmill.

914 8 replies
@RYDENxS 2025-04-12

I was barely awake when I started the video, but that metronome experiment woke me up and made me really happy. Love being a scientist/engineer

571 3 replies
@bluwhale374 2025-05-12

mark: bc the first manmade object to break the speed of sound- me: celery🗣🗣

373 5 replies
@janekrubes 2025-04-12

14:54 "to understand his answer" but you never let him answer...

341 4 replies
@collinperry 2025-08-21

Fun fact if you’re flying an airplane and you’re flying into a strong enough headwind, you can go backwards over the ground

69 1 replies
@tedknapp6915 2025-12-29

Thank you for explaining Tidal Lock for the moon so simply 👌👍🏼

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