[ Cisco sees it before Eddie does; Eddie is focused internally, on the process of calling forth that energy, going through whatever mental or emotional hoops he has to, to coax it out. But Cisco sees the moment there's a faint shift, and Eddie's skin seems to pale. He realizes a moment later that it's because a faint blue light is coming from it, washing his hand out before blurring and obscuring it.

The smile that spreads across Cisco's face is soft with delight and wonder. He looks up at the same moment that Eddie does, and for just a moment that smile falters. Cisco just stares, because Eddie's eyes have gone white - entirely, but enough to make it very eerie. There's a glow, that same color of blue as had been coming from his hands, surrounding them. ]

Eddie... your eyes...

[ It's instinct that has Cisco reaching a hand into his pocket, pulling up his phone quickly to switch on the camera, so Eddie can use it as a mirror to see himself, see the change that has come over his face. Cisco laughs, not even quite knowing what to say. It is just... bizarre, seeing Eddie's face like that. ]

It happened with Firestorm, too. Not quite the same, but almost. When Ronnie and Stein were combined, their eyes would go all white.