WWR Lava Flow
The Wahwah Reef Lava Flow can be triggered by using a resource in a way it's normally not used.
Per Joe's hint, using a Large Ice Cube before any of the Green Skips / Red Sharks for the day have been used, will trigger a Lava Flow immediately. This will also reset the Lava Flow time, so that henceforth this will be the time at which Lava Flow will occur every hour. For example, if previously the Lava Flow Time was at 10 minutes past the hour, (ie. 5:10, 6:10, 7:10 and so on), if you use a Large Ice Cube to trigger the Lava Flow at 30 minutes past the hour at 7:30, then this will henceforth become the new Lava Flow Time and it will continue (at 8:30, 9:30 and so on) permanently.