of course! it was advertised as a sleep study but was in fact an illegal human experiment. i just c/p'd from her bio:
"injected an unknown designer drug or chemical into her system. perhaps she had latent mutant genes, or perhaps it was something else — jac has no idea, but what she does know is that she and a couple of other subjects were the only few to survive. they were kept for observation, in separate cells, when jac started to slip into a fevered, delirious state. someone entered the cell to attend to her when her powers suddenly manifested on her behalf, restoring her health and giving her the strength and adrenaline rush she needed to stage an escape with her co-captured."