As you cower inside the dragon float, still bound hand and foot, you start to feel a sense of growing. Next thing you know the dragon float is gone and you look down to see that you have become the dragon! Some of the costumes must have had magical properties. Although you have a few oriental charicteristics, like horns, spines and a brush tail, your overall shape is of a western dragon's bulk. You have the power to breathe fire too
Some of the transformed terrorists appear around the corner, dressed as rats. When they see you in the form of a 15 foot dragon, they open fire. The bullets bounce off your bulletproof scales.
"That tickled!" you say with a grin.
You breathe a plume of fire at them and they literally turn tail and flee. You chase after them, partly because they were going to murder you, partly because they may lead you out of the sewer tunnel.