Reactor Mindburn was a trivia game for the Toonami Reactor website. While the viewer watched the programming, a multiple-choice quiz popped-up and allowed the viewer to answer. Questions are randomly selected and the player must refresh the page to see different ones. Most of the questions have been recovered, but a five out of the total of sixty had to replaced since they could not be found. Fear not, they are tasteful and appropriate.
There was a second trivia game called Meltdown. That one slowly revealed pictures and allowed the player to type in the answer.
Most of the questions to Meltdown have been recovered, but not the Flash Object pictures, so Meltdown is not currently on Toonami: Lost Data. Meltdown has been rebuilt.