Four years ago, a street brawl in Baghpat, Uttar Pradesh, turned into an internet sensation, giving rise to an unlikely star—Harendra Singh, aka "Einstein Chacha." As the viral video resurfaces on its anniversary, social media is once again buzzing with memes and nostalgia. But what really happened that day?

Four years ago, a video from Uttar Pradesh’s Baghpat went viral showing a heated brawl between shopkeepers of two rival chaat stalls fighting over customers.