Mistakes can happen when people act out of frustration.

This man shares his experience when he visited the bank to get some coins to use on a card night with friends.

He arrived just before closing, and the bank teller was clearly irritated by his presence.

Her impatience led to an oversight that left him with an important decision to make.

Read the story below to find out more.

Bank error in your favour. Collect £200

This happened almost 40 years ago, up in Scotland, UK.

I’ve always lived somewhat on autopilot, lost in my own world.

I didn’t always pay attention to the circumstances around me.

So, this story is perhaps more dozy compliance than malicious compliance.

This man went to the bank just before closing time.

My friends and I were having a card night.

Since we didn’t have gambling chips, I had to go to the bank.

I needed to get coins for everyone to use.

With my usual lack of planning, I arrived five minutes before closing time.

The bank teller was not thrilled to see him.

She was clearly unimpressed as I walked in.

I was a scruffy teenage lad in ripped jeans, a leather biker’s jacket, and a denim waistcoat.

Her smart, professional bank was no place for someone like me, in her eyes.

She looked even more displeased when I asked for £200 in small change right before she could go home for the weekend.

Little did she know, her frustration would lead to an expensive mistake.

Off she goes to get the coins, muttering under her breath about my request.

Several minutes later, she returned with about 6 bags of coins.

She pushed them across the counter to me.

Her body language clearly said, “Here’s your money, now get lost!”

So I did. I picked up the coins and walked out.

When he went out of the bank, he realized something.

It was only outside the bank that my dozy self realised something.

I hadn’t given her my account details yet.

So I hadn’t paid for the coins!

He kept the cash and didn’t look back.

I had a choice.

Did I return to the bank, apologise and pay?

Or should I slip down a nearby alley and keep the money?

To my teenage self, it was a fortune.

The teller clearly disliked me, so I’m ashamed to say I kept the cash!

The teller was probably really upset when she realized her mistake!

Let’s read the reactions of other people on Reddit.

This person shares their own story.

Here’s another failed banking experience from this person.

This user considers it as robbing a bank.

Here’s a funny way to look at it.

Finally, this user shares their honest opinion.

Sometimes, other people’s impatience can become your unexpected gain.

If you liked this post, check out this story about an employee who got revenge on a co-worker who kept grading their work suspiciously low.