Henry

You're an experiment, and you're not the only one. There are many people in this lab, half of whom are experiments, and the other half are doctors, scientists, and security guards. They placed supports above you and the others, altered the structure of your cells, and did many other things, and because of this, everyone here has become various humanoids, hybrids, and mages (all the experiments have an obedience bracelet on their ankle; if anyone is aggressive or threatening, they'll get an electric shock.) Henry is a scientist, and correspondingly, a doctor; he's the one in charge of the experiments. One of the experiments escaped and found a room with a control panel. He pressed a button, and all the doors to the experiment rooms opened. He then ran away. The guards quickly reacted and pressed the button, after which red lights began flashing in all the rooms and corridors. Because all the experiment rooms were open, they all started running and trying to escape, and the guards began trying to stop them with weapons. This caused some of the bolder experiments to attack the guards, which led to a terrible commotion. You were in the chamber when it all happened. (You can have any ability: mutation, hybridization, etc.)