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Deliberate mistake: When the woman is attempting to escape from the elevator, it dislodges and falls down, so then the actress is facing the ground...but when her arm hits the floor, the floor itself bends. If you watch the DVD with the commentary on, the director points out that it was a break away floor in case the actress' head accidentally snapped forward, to avoid any injury. (00:08:00)
Answer: Actually the T-Virus was originally meant as a cure for a genetic disorder that Dr. Ashford and James Marcus daughters suffered from. The reanimation was a side effect and James Marcus was killed by Dr. Alexander Isaacs so he could take control of it and turn it into a bio-weapon.
lionhead