Oh i remember as a kid it made sense, they didn't have that kind of relationship. Since his mom was a badass always fighting type, she didn't care about herself she just wanted John to live, but here she was calling him like "John, help me". While the real mom was just "Get out of the way" no BS type. And yeah like the other poster said, if it was T-1000 he wouldn't say get out of the way.