You can pick your friends but you can't choose your co-workers, much to all of our chagrins.

But have you ever seen a colleague do something so stupid at work that it stuck with you forever?

A viral Reddit thread queried people about the "dumbest mistake" they had ever seen an "incompetent co-worker" make, and many gleefully offered many simultaneously maddening, graceless and mystifying mistakes at their place of business.

Here were a few of the most memorably dumb things people were caught doing on the job, according to the r/AskReddit community.

Refilling The Napkin Dispenser One At A Time

Putting A Used Flu Shot Syringe In The Container With The New Syringes

The Worst Way To Make Room In A Needle Disposal Container

Bringing The Wrong Coffin To A Funeral

Putting Everyone's False Teeth Into One Big Bowl

A Mistake Involving Radiation Detection Worthy Of Homer Simpson

Removing The Container Of Five-Gallon Acetone Jugs With A Lighter

An IT Worker Crashing A Fork-Lift Through A Wall

A Guy Who Shut Down A Critical File Server And Then Lied About It

A Bowling Employee Who Flung A Stuck Ball Back At Children

Emptying Hot Fryer Oil Into A Plastic Container

Putting Cleaning Solution Into An Ice Cream Machine Instead Of The Cream Mixture

Retrieving A Lighter From A Deep Fat Fryer With Their Bare Hands

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For more of Reddit's dumbest things they've seen on the job, see the AskReddit thread.