Jonathan's power awakening during his panic attack.
I think it was a nice touch that Jordan asked Jon in the earlier episodes why he's always able to remain in control with a steady heartbeat while everyone else is freaking out...
And that's kinda been the case in the past seasons. Jon always tried to remain cool and collected and calm others.
And the one time that he loses control and has a panic or anxiety attack, his abilities get triggered.
I'm saddened that we lost this show because of stupid James Gunn's idiotic DCU vision that is barely making any money. What a waste. This show could have gone for 9 seasons and I'd have enjoyed every single bit of them all. :(