A new crisis has emerged at Twitter, as a wave of employees has apparently rejected CEO Elon Musk’s demand they sign a pledge to work long hours as part of an “extremely hardcore” Twitter 2.0, or leave the company. Musk had set a deadline of Thursday for employees to sign a Google form, pledging to work “long hours at high intensity,” and that, “only exceptional performance will constitute a passing grade.” However as the deadline passed, it appears a large number of employees have refused to sign the form.

Musk had indicated those who did not sign the form would receive three months severance, and be released from the company going forward. Exactly how many employees have opted to not sign the document is not clear yet. A report in the New York Times said hundreds had refused to sign while other early reports indicated there may have been many more than that. Twitter had already cut half of its workforce following Musk’s takeover of the company.

Employees flocked to the platform to tweet their final farewells. On tweet featured a group of employees in a Twitter office counting down to the 5PM deadline, while one is saying, “We are all about to get fired.”

The refusals may have spooked the billionaire CEO, as he appeared to walk back some of his earlier demands, such as banning all remote work. However he still maintained he would hold managers responsible for the work output of remote workers, and they would be terminated if the remote workers under their leadership failed to perform.

Musk and his lieutenants also appeared concerned some employees might sabotage the company on their way out the door. In response, the company temporarily closed all office buildings through the weekend, and suspended all employee access badges.

On Monday, November 21st, the offices will reportedly reopen, after Musk and his team complete a thorough review of which workers they will need to cut access to, and how to protect critical infrastructure from sabotage. Platformer’s Zoe Schiffer said, “We’re hearing this is because Elon Musk and his team are terrified employees are going to sabotage the company. Also, they’re still trying to figure out which Twitter workers they need to cut access for.”

Some are speculating the latest exodus of engineers could make it difficult for the platform to maintain normal operations, especially with the start of the World Cup a few days away.