Subverted: Bob is in Mr. Pointyhair's office, expecting a dressing-down and the phrase "you're fired". Instead, he only gets the dressing-down.
Double Subverted: Then Mr. Pointyhair's superior comes in to fire Bob.
Zig Zagged: Bob is fired from his job for something inconsequential, then promptly rehired for something equally inconsequential. Then fired again, and rehired again. The sequence continues until neither Bob nor Mr. Pointyhair is certain whether Bob still works here.
Averted: Bob is not fired for anything inconsequential.
Enforced: "We need to show that the boss is zany! Let's have him fire an employee for no reason!"
"Let me guess...I'm fired."
"You lost your job again, Bob? All right, back to the want ads..."
Mr. Pointyhair decides to be a jerkass to his employees.
Trope Co. needs to dismiss a few employees in order to remain profitable, but under Tropeland's labor laws, they can't unless the employee has done something to deserve it.
Exploited: Bob gets hired on by a complete Magnificent Bastard, who points out that with one more firing, he'd be practically unhirable.