I would think it would wind the Nr up very quickly if you introduced that much airflow suddenly into the disc from below with zero collective pitch!
Tourist - you don't carry out the EOL from a zero speed condition, you adjust to normal auto speed before that and only use the zero speed to help you reach your aiming point. A constant attitude EOL is still done from 30-40 kts IAS so lots of forward speed.
However, raising the lever in a zero speed auto will simply decay the Nr, way before you get to any chance of opposing the upward flow through the disc and revisiting VRS - you would have slowed and stalled the whole rotor and properly fallen out of the sky. It would reduce your RoD a bit, but only temporarily.