You were in the Vault of Knowledge realm, where in the Secret Area, the Days of Mischief event was at. Which was an Halloween event from mid-October til the beginning of November.

You were exploring the place, the sky red with a white crescent moon, Halloween decorations, and the huge black krills that you were able to ride with friends.

While looking around, you saw many skykids, ikemen, and etc. You spot two ikemen standing beside each other, they spot you and wave.