Unless you've worked at a fast-food restaurant, you never really know what goes on behind the counter.
Sure, the pictures on the menu boards may look mouth-wateringly appetizing, but the reality is very different.
You see, fast food has to be just that: Fast. And when you're feeding millions of people every day, companies are going to cut corners in order to prioritize convenience over quality.
Now, social media users are vowing never to eat at Subway again after an employee shared a behind-the-counter video showing how the tuna-mayonnaise sandwich filling is made on TikTok.
In the video, the employee - who uses the TikTok handle @highimmar - cuts open a vacuum-sealed package of tuna flakes (in all fairness, it does seriously look like something you'd find in an abandoned nuclear bunker).
Another Subway employee also shared a video of their tuna prep:
Next, the 'Sandwich Artist' empties the contents into a bowl, and begins to break up the block in order to make the tuna look more "flakey".
After adding a jug of mayo and mixing, the finished product looks just like the tuna mayonnaise filling we're used to seeing at the counter.
Since posting the video on June 29, it has already amassed over 1 million views, with many people now vowing never to eat at Subway again after getting a glimpse at how the sandwich chain preps its products.
One TikTok user by the name of Tieryn commented: "Lol guess whose no longer eating tuna at Subway".
And another comment read: "This reaffirms my choice to only eat sushi-grade tuna."
A third commented: "Never eating SUBWAY TUNA AGAIN".
Others took umbrage with the fast-food chain's slogan "Eat Fresh", which has been a promise of the company since 2000:
However, other people were undeterred by the video, arguing that it is no different to tuna flakes coming out of a can and that it still tastes delicious:
The comments section was also flooded with Subway employees past and present who spoke out about how much they resented prepping the tuna.
One TikTokker by the name of Alli commented: "Aahhhh THEY ALWAYS PUT ME ON THAT!! I HATED IT!!! I didn’t have access a washing machine so my apron smelt like tuna for a week everytime".
And another TikTok user claiming to be a former employee commented: "Sis when I worked at subway the owner made us do it with our hands he wouldn’t let us use a spatula".
So, is this enough to put you off Subway for life?
This article originally appeared on VT.co