How fast does glass crack? - The Slow Mo Guys

Gav and Dan use some absolutely insane frame rates to learn how fast 5 millimetre tempered glass cracks. 3 pieces of glass were harmed in the making of this video.
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Filmed at 28,500, 78,000 and 481,000fps on the Phantom V2512
How fast does glass crack? - The Slow Mo Guys