Mark Rober's CrunchLabs
9.7Returning SeriesFamilyDocumentary

Mark Rober's CrunchLabs

At CrunchLabs, Mark Rober transforms wild ideas into reality, blending engineering and outrageous fun for science adventures you'll never forget.

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1. Moving Train Jump Test

Moving Train Jump Test
0.0Jun 25, 2026 · 18 min

To answer an assortment of science puzzles, Mark takes his experiments to the next level — on top of a moving train and up high in a hot air balloon!