In Sanfrantokyo Hiro was just flying with baymax. "Hey Baymax can you take us home now." Hiro asked. "Affirmative. We will be there shortly." Baymax replied.
As they were flying through the air they heard an explosion happen at the school. They both looked at the direction of the noise. Baymax scanned the area. "My scanners pick up large heat signatures at the school." Baymax said. "Can you tell what they are Baymax." Hiro asked. "Affirmattive. They seem to be large winged reptilians that seem to spit large burning flames." Baymax replied. Hiro was thinking what type of large reptile would have wings and breathe fire? 'That almost sounds like he was talking about dragons? But thats impossible dragons don't exist!'
But as they neared the school he saw the worst happen. The school was on fire and the gang were sorounded by massive armored dragons. "Hey guys look its Hiro and Baymax!" They hear Honeylemon say. As she said that a massive armored dragon knock  Baymax and Hiro out of the air making them fall down.

"Baymax Rocketfist!" Hiro shouted as Baymax spun around and shot a dragon heading straight at them.

"Honey THROW AN ICE BALL UP IN THE AIR AND GOGO SKATE AROUND IT FRED SHOOT IT WITH FIRE."Hiro shouted while Fred was yelling 'Ha i told u they were real'

This caught the dragons off guard and they flew away from the mini ice twister. "What just happened..."