Here's one "I doo" that you'll never want to say.

One newly-engaged man and his fiancée got more than they bargained for while filming an engagement announcement video for their families.

The man proposed to his girlfriend on the park bench where they first met, according to the YouTube video uploaded by the man's friend, user AngelTownPictures. But the scene takes a turn for the worse after only a few seconds.

The video starts off with the bride-to-be talking excitedly into the camera to her mother about her engagement. She's then interrupted by a man running behind the bench who stops to yell at another man walking his dog for neglecting to clean up his pet's waste. (You'll have to watch the video to see the shocking -- and disgusting -- thing the runner then does to the dog walker.)

The video's editor, Adam, said in an email to the Huffington Post that the video is 100 percent real. He said it was taken with his friend's cell phone "a while ago," but was only recently uploaded to YouTube.

What do you think? Do you believe the video is real? Let us know in the comments.

Click through the slideshow below to read about some other proposals that didn't quite go as planned.

Keep in touch! Check out HuffPost Weddings on Facebook, Twitter and Pinterest.