Tesla unveiled its Cybertruck pickup truck on Thursday.

During the event, Tesla CEO Elon Musk suggested that the vehicle’s window glass was stronger than that of a typical car. But two windows on the vehicle cracked after Franz von Holzhausen, Tesla’s head of design, threw a metal ball at them.

Here’s how Musk reacted to the Cybertruck’s glass cracking:

http://www.youtube.com/watch?v=SwvDOdBHYBw?start=461

"Oh my f------ god," Musk said after von Holzhausen's first throw.

Musk then said the throw may have been too hard and laughed, saying that, at the very least, the ball didn't go through the window.

"Eh, not bad. Room for improvement," Musk joked after the second throw, which cracked the window behind the first one.

Tesla had thrown wrenches and a sink at the glass used for the Cybertruck without breaking it, Musk said, before joking that the company would fix the video of the event in post-production.

Tesla plans to begin production of the Cybertruck, which starts at $39,900, in late 2021. The vehicle's most expensive trim, which starts at $69,900, will have a maximum range of over 500 miles, a maximum towing capacity of over 14,000 pounds, and the ability to accelerate from 0-60 mph in under 2.9 seconds, Tesla says.

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