This knife foreshadowed what happened next...

The video uses a common dumpster diving trope with a surprising and disgusting twist. The contrast between the initial discovery of a 'cool' item and the subsequent unpleasant smell creates a strong emotional reaction and curiosity.

The creator finds a decorative knife in a dumpster and later discovers a bag of tuna fish that has leaked, causing a strong odor. The creator then uses the knife to cut open the bag, revealing the spoiled tuna.