This geyser hates me. I made my wife and friends sit through 10 Turban eruptions (Turban erupts every 20 minutes = 3 hrs and 20 minutes) waiting for Grand to go off. "It's the main attraction of Yellowstone," I said. "Just be patient, it'll be worth it!" But of course the sun went down and we never saw Grand go off. Maybe next time. Now, it owes me.