With the sudden change of scenery and weather Thor and Steve had to hold their arms up over their faces so their eyes could adjust. Riza hadn't need to for her suit let her adjust when they had become the last ones to come into the city with Loki and the Avengers. That was the last of her worries for she had looked to her father to see that he looked like he may pass out. "Dad? Come dad. Hold on-" Her words cut off by a sudden cry as some sort of force that tackled her. To everyone else, it seemed that a frost giant had followed them back through the passage. 
She kicked the giant back with her repulsor boots charged and hit him in the chest while flipping over and landing on her feet when adjusting and calculating the result. She had then run up to the giant, using a boost from her boots, she spun and round house kicked the stumbling Joutun in the face. Steve had went to give the young Stark a hand and too changed but used his shield to punch the Joutun, his side being hit but the shield. Riza took that advantage by charging her repulsors and shooting a blast at the Joutun's cracking side, now with a big chunk missing. Riza was however too close as the Frost Giant had ran up to her and had used what strength it could muster to swing his fist up and then swung back, hitting Riza and making her fly back into a building and falling to the ground after making contact with the wall. She wasn't moving and unresponsive. The frost giant then looked to Rogers and the rest. Thor was trying to summon his hammer which wasn't taking so long for it wasn't that far. He was ready to defend Tony for now only the suit defend him.