Also that wall needs to be able to sink down into the ground. Also it needs to be able to rise at the push of a button to effectively cut off suicide and ramming speed cars from impacting particular people and buildings. No sweat!
![](https://altdriver.com/wp-content/uploads/sites/2/2016/05/2016-5-3g.jpg?w=1056)
Also that wall needs to be able to sink down into the ground. Also it needs to be able to rise at the push of a button to effectively cut off suicide and ramming speed cars from impacting particular people and buildings. No sweat!