Part of Scorpius wanted to launch a series of spells at Manes, but he also didn't want Sean to get caught in the crossfire, because Manes was a damn good shot.
If something happened, and he managed to survive, it wouldn't be for long by the time people got done with him.
"Yeah, we need to go. And now," Scorpius said as he reached for Sean, apparating them away with a loud crack.