A patient came into the ER for chest pain. He was uncomfortable and a bit anxious but otherwise normal. The guy was a military officer and very athletic. I go in to draw his blood and get some background information, we’re chatting as I get my supplies ready, and as I’m putting the needle in his arm he says “you’re from the government.” in a very cold voice. I look up and his face has completely changed. He’s furious and looks like a cornered animal. Before I can ask “what?”, he screams it again and rips the needle out of his arm. He kicked me backward and then stood up while screaming “you’re from the government” repeatedly. I get to my feet and he charges, easily twice my size and probably trained to kill. I run to the far end of the ward, he keeps running after me, and the only thing that saved me was having my paramedic boots on. I managed to get one good kick with the steel toe into his shin and brought him down after which I got him into a restraint position and the doc sedated him. I had never seen psychosis suddenly come on like that from a completely neurotypical presentation. A switch flipped mid-conversation and he was determined to kill me without any ability to perceive pain or limit the strength of his muscles. I broke his leg and he was unaffected, still trying to get up and attack me again.