I've seen the most ruthless resignation not as throwing a cup, but as making the boss beg to come back.

Our company laid off staff last month, Old Zhou, who had been in operations for eight years, was the only one who knew all the server passwords.
HR called him for a talk, saying "organizational restructuring," gave him N+1.
He didn't argue or make a fuss, signed the papers.
At 10:20, he returned to his workstation, turned on his computer.
At 10:21, a message popped up for the entire company of over 500 people: "Goodbye, everyone, take care."
Then he left all the groups—department groups, project groups, dining groups, carpool groups, even the company's main group.
HR panicked. All server root passwords, not handed over.
The team leader called him, but his phone was off.
Sent a message with a red exclamation mark.
The team leader called the manager: "Old Zhou deleted me!"
The manager's face turned green: "He also deleted me!"
The boss personally called him on his private phone.
It rang.
Old Zhou answered: "Hello?"
The boss said: "Old Zhou, it's me, the password..."
Beep—hang up.
When called again, he had blacklisted the number.
At 2 p.m., servers started reporting errors.
By 3 p.m., three core business systems crashed completely.
At 4 p.m., the CTO drove to Old Zhou’s house himself.
Old Zhou opened the door, wearing pajamas, still holding that resignation agreement, and said leisurely, "Bro, I followed the process. The company didn’t ask me to hand over anything."
The CTO gritted his teeth: "Can you…?"
"Yes," Old Zhou smiled, "reapply for the job, double the annual salary, and transfer the money first."
The CTO immediately called the boss.
There was silence on the other end for ten seconds.
Finally, just two words: "Give it to him."
The next day, Old Zhou was back.
His workstation was unchanged, his computer was the same, even the water in his teacup was poured in advance by HR, still steaming.
Colleagues asked if he felt good.
He took a sip and said, "It’s not about feeling good or not. I just want the boss to know—some people, once deleted, can’t be added back."
When the company fires you following the process, don’t show mercy when you delete the company.
Rules are such that whoever throws the table first wins.
Later, I heard the boss held a meeting, requiring all core positions to have two people hold the passwords.
Old Zhou raised his hand at the meeting: "Then can I negotiate another round of salary increase?"
The room went silent.
The boss looked at him.
Guess what the boss said?