Cisco Ramon: He can't blast because he's getting older?
Caitlin Snow: Mm-hmm. Powers like yours require a lot of energy. And when that energy starts to dwindle...
Cisco Ramon: The vibe blasts are... the first things to go.
Caitlin Snow: I think you have to tell him.
Cisco Ramon: He's never, ever gonna let me see Gypsy again if I tell him. He's probably gonna send a knife flying through my skull if I tell him.
Caitlin Snow: He might. But it's the right thing to do.