WHAT WOULD HAPPENED IF THEY LIVED TODAY?

Imagine what would happened if these ancient giants were to come out the streets of a modern city.Looking like sinister tanks,Mighty cranes and enormous gliders,these fabled monsters would stop traffic in the city,turn buses upside down,tear electric wires and trample all the parks.Actually,of course,this would never happen because the ancient animals died out millions of years ago,and we know about them only from the "CHRONICLE IN ROCK"