Mr. Burns

In the Simpsons - Futurama crossover, Simpsorama, the town dig a hole to place the Springfield Elementary time capsule, only to find large amounts of nuclear waste pumping through (including an Atomic Energy Commission employee inside) The whole crowd instantly stares at Mr. Burns, but he responds "That could be ANYONE'S ooze". Obviously though, this has the Nuclear Power Plant's hands all over it. His only other appearance in the Futurama franchise is in