S4: Ep.23 Java reveals to Siva that Lex didn't actually steal all that Techno equipment, but rather she framed him for Siva's good.
Siva loses it and accuses Java of being jealous of what she has (had) with Lex.
In return Java slaps Siva very hard across the face.
But what I want to know is why Siva's communications headset isn't a millimeter out of place afterward. I'd expect it to be bent out of shape and/or hanging off Siva's head.