It only took a moment for Riley to pin Lexx. If Lexx had wanted to, he could easily have tossed the littan. He just didn't feel like it. Riley wasn't going to do anything to him to hurt him. Why waste his energy?
"Stop being such an immature brat, Lexx!" Riley leaned over him, "This is not how it is! You have friends. You are not alone. We do care about you, otherwise we wouldn't keep trying to help you. But at some point, you are the only one responsible for why you are alone,… not us."
"… Chel's not coming back…" Lexx frowned.
"I can't speak for Chel," sighed Riley. "Stop pitying yourself. You're going to win… and you will be free."
