Who knew changing coffee could cause such carnage?

A 19-year-old summer temp exacted sweet revenge on a clique of hostile older coworkers by secretly hijacking the office coffee supply for two chaotic weeks. Assigned the daily ritual of buying beans and loading the machine, he faced constant rudeness and isolation from day one.

What makes the story more complicated is the physical fallout—decaf withdrawal headaches in week one, followed by hyperactive jitters and unexpected digestive disasters from ultra-strong brew in week two. The office transformed into a caffeine-fueled battlefield.

‘Who knew changing coffee could cause such carnage?’

The temp role landed him in a toxic office dominated by unfriendly colleagues.

When I was a student I took temp jobs through the summer holidays to make ends meet, and I worked through an employment agency. I (M19) was placed in an...

who made it clear from the outset that they didn't want me there, and were rude and isolated me. One of my jobs was to buy the coffee and load...

The payback unfolded quietly over two weeks with swapped coffee types.

Revenge was simple for an entire week I loaded de-caf coffee and watched them slump, get snappy with caffeine withdrawal and generally suffer a little bit. The next week, I...

EDIT: I've since learned that some people have quite the digestive reaction to caffeine. I imagine some were constipated in week 1, and some had the world fall out of...

Workplace pranks like coffee tampering sit at the crossroads of harmless mischief and reckless endangerment. The temp’s two-week experiment masterfully weaponized a daily ritual against chronic hostility, delivering poetic justice without fingerprints or confrontation.

Skeptics highlight genuine medical risks—sudden caffeine withdrawal triggers migraines, irritability, and fatigue mimicking illness, while a jolt from ultra-potent beans like “Lava Java” can spike heart rates, induce palpitations, or exacerbate IBS in sensitive individuals. In addition, the edit’s revelation of digestive chaos underscores how bodily betrayal amplifies humiliation. Yet the short timeframe and absence of reported hospitalizations kept it in prank territory rather than lawsuit bait.

From an organizational lens, bullying often festers unchecked in hierarchical settings, especially toward temps seen as disposable. This stunt flipped the script, forcing the clique to experience vulnerability they’d inflicted. “When formal channels fail, anonymous acts of petty rebellion can recalibrate power and deter future abuse,” argues Dr. Tessa West, NYU social psychologist and author of Jerks at Work (2024 TED Talk). She cautions, however, that escalation-prone targets might retaliate disproportionately.

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Ethically, the prank scores points for proportionality—the suffering mirrored the emotional toll of isolation, not exceeding it. Socially, it joins a pantheon of underdog legends where the little guy brews chaos to level the playing field. The real genius? It ended when the temp presumably left, leaving the office none the wiser and forever paranoid about their next cup.

Here’s the comments of Reddit users:

Many users hailed the prank as genius payback for office cruelty.

OSUJillyBean − I am not a coffee drinker. One of my old jobs (vet clinic receptionist) wanted me to make the coffee. After the first two or three weeks, it...

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NefInDaHouse − As a coffee addict the week of decaf made me wince, but damn, that's what you get for being a catty biotch xD

ShesASatellite − This is beyond petty, this is straight up *evil*. I like it 😈

Zoreb1 − As a kid my mother asked me to make her instant coffee. I thought it was like hot chocolate and added a little more that she requested; it...

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fromthelandofdjel − Applauding you for the monkeys on crack scene. ...well done

A couple shared similar tales of coffee-related chaos or warnings.

NorskGodLoki − Since I do not drink coffee they would never want me making coffee. They had me make coffee ONCE in the Army. Never told me to make it...

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Witty_Health3146 − To anyone else reading this, when this guy did this it ended fine. If you try this, someone you’re doing it to might have heart issues. Too much...

Humorous anecdotes kept the vibe light and relatable.

ByGollie − I had a story in a similar setting, but instead of coffee, i was handling their I. T. One particular Karen didn't like me, because I was younger,...

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I found out from someone else that she referred to me by a mildly derogatory term describing people from my country. In office - they used to play some sort...

So i eventually changed career paths and left the MSP - and as a going away present for Karen, I used a hex editor to edit her scores, and replaced...

For good measure, - a small script was set up to replace the INI and score list off a network share, so no matter how often she would remove and...

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Parking-Ad-6320 − As a coffee lover, that is n__ty but I still love it. Petty and wonderful.

Local-Recognition969 − I worked at an office where one of the supervisors didn't like me. I don't drink coffee but she insisted that I make it as it was my...

The young temp turned daily coffee duty into a masterclass in subtle vengeance, cycling decaf slumps into high-octane mania that left bullies bewildered and bowels in revolt. Years later, the edit reveals unintended potty humor as the ultimate punchline.

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Ever weaponized a workplace essential against tormentors? Where’s the line between harmless prank and hazardous stunt in office revenge?

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