Gladius wasn't expecting the power to go out.
It did, anyway, and he was left alone in the dark. Dr. Muteer had looked extra sad today, and left him in his cage to go get something (that's what he thought, anyway). The cage, being electronically locked, was child's play to open now that there was no power.
'Huh,' he mused to himself, absent-mindedly scratching his floppy ears. He considered waiting for Dr. Muteer to return with supplies, but heard crunching and shuffling noises in the distance. Now, this wasn't unusual; he knew of the other Chimeras and the occasional noises they made, but the absence of light made it very unsettling. Gladius could see fairly well in the dark, and made his way cautiously into the hall, his two feet treading silently on the cold concrete floor.
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In an abandoned lab not far from where Gladius was, Dr. Jim Muteer jumped from a chair.
His body dangled a few centimeters from the ground, the only thing keeping it hanging a noose made of electrical cord.
It was absurdly peaceful.