You and your scientists accidentally made a infecting land, it has more radiation ever, if you even try throwing in that land, it will grow and escape the facility and be a global threat. It will grow larger and larger if it eats a forest.

One of the scientists accidentally thrown in a radiation bar onto it. The fleshy and bloody land grown and escaped the chamber and the facility, before it escaped it ate 5 of your scientists. Good thing you escaped w/ your friends experimenting it.