"I wish that I would meet a dragon." After the stone glowed, Jon heard a bellowing roar and he felt the floor shake.
He ran to his window and saw a giant lizard walking down the street (literally on the street), knocking over cars and breathing fire, which unfortunately hit some of the houses in the neighborhood, causing them to burn ferociously.
"Oh, man. What did I do?"
He sprinted downstairs and out of the house. The destruction was immense. People ran every which way, screaming in terror. Police cars and other emergency vehicles were showing up. And some of the houses had already burned to the ground. The whole thing was a disaster.
Jon only wanted to meet a dragon, not have one rampage through the town.