Internet - Don't mess with this Rottweiler! A viral video of the dog's reaction to being given the finger left thousands of TikTok users hiding behind their couches.

"Dude, I'm scared!"

Plenty of the replies under user nolieolie_'s scary TikTok clip expressed similar feelings. In it, the big pooch named Wocky shows exactly what he thinks about being pranked.

Wocky's owner pretends to get him a treat. He makes a convincing show of having something tasty in his closed fist and walks back to the dog, who is lying on a bed and clearly expecting a snack.

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But Wocky's mood quickly turns sour when his human opens up his hand to reveal nothing but the middle finger!

Bad idea! Quick as a flash, the offended cranky canine bares his fangs and snaps at the offensive gesture. Luckily, nolieolie_ manages to draw back just in time, but it's a close call.

The startling scene made a big splash on TikTok and only four days after its release, the clip already has more than 11.2 million views and over 2.6 million likes.

A lot of users were genuinely scared by the unexpected attack. "Oh my god, my phone just learned how to fly," one wrote, while another also admitted to getting a fright: "My heart jumped out of my throat, bro!"

The top comment summed it all up in rhyme: "He protec, he attac, he just wants a snack."

But don't worry, no human or animal was harmed in the making of the video. In a later upload, Wocky finally got his treat too.