When Dr. Eric Border exposed his true identity as the Joker in the asylum and infected a portion of Clayface with Joker venom, unleashing the new monster Clownface, Silverlock was awakened from her coma and escaped from the asylum in the confusion.
Dr. Eric Border exposed himself as the Joker at the asylum, infecting Clayface with Joker venom to create Clownface. This led to Silverlock waking up from her coma and escaping the asylum amidst the commotion.