The Triangle Dance Challenge, also known as the Milkshake Challenge, became a global viral sensation in early 2019. It involves three people standing in a triangle, holding each other's shoulders, and jumping inward one at a time in a synchronized rotation. While the challenge started as a test of coordination and rhythm, it quickly evolved into a popular meme template. Users often label the three participants to represent different entities working together—or failing spectacularly—to achieve a goal. It remains a staple for depicting teamwork, synchronized efforts, or the sheer chaos of group dynamics.