Upgrade knew exactly what the situation was and what was expected of her, and agreed to it. This is a no nonsense test of pain endurance through solar plexus punches. Upgrade bought into it completely and was on board. It's asking a lot for a girl to be dropped repeatedly from solar plexus punches, and keep getting up for more, and she was expecting to endure that pain. Riot did the best she could to nail that weak spot each time and the pain spread throughout Upgrades body each time she was winded and went down to recover.