Just because a game has been played by millions of people, millions of times over, doesn't mean we've uncovered all of its secrets. Case in point: YouTuber ZeldaFreakGlitcha recently used a bug in Ocarina of Time that allows him to complete the game in 23 minutes. The glitch involves defeating Queen Gohma and activating, but not traveling through, the warp gate, which then drops child Link in Ganon's castle, and miniaturized missions ensue.
Usually we'd say defeating Ganon is no small feat, but with this, well... you know. ZeldaFreakGlitcha is live-streaming more attempts to beat his best bug time today on TwitchTV.