(Bloomberg) –Elon Musk unveiled Tesla Inc.’s eagerly awaited electric pickup truck on Thursday but it didn’t go as planned, ending with two smashed windows and the hashtag #cybertruck trending on Twitter for all the wrong reasons.

In the demo, Tesla chief designer Franz von Holzhausen initially took a sledgehammer to the truck, which withstood the impact. Then it all went wrong.

Von Holzhausen took a metallic ball in his right hand, wound up and tossed it at the truck — smashing the front driver-side window, stunning the audience and viewers live streaming the event.

“Oh my —ing god,” Musk said, when the window broke.

“Maybe that was a little too hard,” Musk said after the ball cracked the glass. So they tried again. A second test broke a second window.

Tesla’s #CyberTruck has strong windows…but not that strong.😳  – @elonmusk pic.twitter.com/1d0yfCfJqy

— Casey Dwyer (@Casey_Dwyer) November 22, 2019

 “It’s classic Tesla. It’s poetic,” said analyst Gene Munster of Loup Ventures. “I applaud the company for taking risks: this was not a boring presentation. The broken glass was unpredictable. This wasn’t practiced.”

The event was shown on YouTube, with the video made private shortly after. The heavy-duty truck retails from $39,900 and will come in three different variants.

When everything’s going wrong but you still gotta finish your presentation #Cybertruck pic.twitter.com/bxEGe5nTvW

— Tryphon342 (@tryphon342) November 22, 2019

This is what happens when you let people from silicon valley design a truck…. Big yikes #Cybertruck pic.twitter.com/OIPvcQPFmH

— James Paquin (@James_Paquin) November 22, 2019

“This obviously wasn’t a true production vehicle so Tesla gets a pass for now,” said Akshay Anand, executive analyst at Kelley Blue Book. “But if they are going to market the glass as a differentiator, they better be able to show stronger tests leading up to launch.