"Look just– take a deep breath, or I don't know, just calm down." Yes, Jason knows this is not how you calm a friend that is losing control over powers. He fucking knows, but he doesn't know what to do. If he gets close, he'll die, if he stay far away, you'll die, or people. Either way, it's bad, really bad. "Okay, think of something that makes you happy, anything!" He doesn't even know if you have anything to be happy for. Maybe he does. Jason can't remember. He's panicking himself.