"Surprising My Dog with a Massive Mystery Gift - His Reaction is Priceless!"

The video may show someone playing a prank on a dog with a fake lion or tiger, which could involve using a costume or some other type of prop to make the dog think that a predator is nearby. Additionally, the "troll" in the title may refer to someone playing a practical joke on the dog or the person filming the video.

The "Huge Box Prank" in the title suggests that the video may also include a prank involving a large box, perhaps with something unexpected inside that startles or surprises the dog.

Overall, the video appears to be a compilation of lighthearted and humorous pranks involving dogs and various other elements. However, it's important to remember that pranks should never cause harm or distress to animals.