It was not the kind of smash hit that Elon Musk or other Tesla (TSLA) - Get Tesla Inc Report executives were expecting.

The electric car maker on Thursday rolled out its highly anticipated, "Mad Max" and "Total Recall"-looking Cybertruck to much hype and fanfare, with the usual energized, light show-infused, music-pumping lead-up of a big auto reveal.

The unveiling of what Musk himself hopes will re-define the ubiquitous pickup truck that dominates North American roads and highways was relatively flawless - at least until it came time to demonstrate the vehicle's shatter-proof and purportedly bulletproof windows.

"Oh my f*** God," Musk muttered after an aide hurled a metallic ball at the front window in real time - a test that was intended to show its durability - and instantly shattered it. The back panel of the truck was also smashed during the stunt, leaving Musk visibly stunned.

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"We threw wrenches, we threw everything even literally the kitchen sink at the glass and it didn't break," Musk said after the incident. "For some weird reason, it broke now. I don't know why. We will fix it in post."

Moments earlier, after successfully showing how the Cybertuck can withstand a blast from a sledgehammer without leaving a scrape, Musk did concede that windows could be perceived as the main "vulnerability" of the new pickup, which will carry an entry level price tag of roughly $39,900.

Reaction in social media was both swift and fierce, not only to the botched demonstration but to the design of the truck itself, which drew not-so-flattering comparisons to the now-retired Pontiac Aztek, or to something designed in Roblox.

It was also the second embarrassing mishap for Musk in as many days, after the first full-size prototype of the SpaceX Starship rocket exploded during pressure testing on Wednesday.

The cybertruck has a 250-mile range at the low end and 500 at the high end, according to Tesla. It will take a neck-wrenching 2.9 seconds to reach 60 mph, a performance figure that places it on par with some of the world's fastest sports cars.

General Motors (GM) - Get General Motors Company (GM) Report  has also announced plans to build an electric Chevrolet pickup, and Ford (F) - Get Ford Motor Company Report  has confirmed plans to build an electric truck called the F1-150.

Investors didn't appear to be all-too-impressed with the Cybertruck, with Tesla stock ending the day Friday down 6.14%, or $21.79 a share, at $333.04.