Why did the windows of the Cybertruck break?

Normally, it would not be surprising if a glass that has been hit with a steel sphere is broken, but Tesla workers made a long demonstration by dropping this type of elements by a long vertical axis on a piece of glass of the new window to Prove there was no effect. Then, when Tesla designer Franz von Holzhausen took the stage and threw a sphere into the window on the driver's side of the Cybertruck, the cracks appeared.

When von Holzhausen threw the ball into the back side window, the same thing happened. Musk spent the rest of the presentation standing in front of the Cybertruck with its two broken windows.

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On Sunday night, Musk offered an explanation. Shortly before von Holzhausen threw the steel sphere into the windows, he had hit the door of the truck with a large mallet. That was to demonstrate the strength of the vehicle body panels. But the impact of the blows from the mallet also slightly damaged the glass, Musk said.

"The impact of the hammer on the door cracked the base of the glass, so the steel ball did not bounce," Musk tweeted. “I should have hit the window with the steel sphere first and then hammer the door. For the next time …"