Screaming or howling

.../I am out of the city, standing between an open field and a school. The whole sky is densely covered with dark storm clouds. It is dawn. I see there is a lot of people wearing clothes from different religious grounds on the place when we hear a loud roar followed by its echoes. I cannot distinguish if it was a thunder or the eruption of a volcano when I see far in the field a huge rock making its way through the clouds like a meteor although I cannot see any fire nor smoke behind it. On the contrary, it looks like it was thrown by a catapult although it seems to be breaking the speed of sound because of the vapor cloud that can be seen around the rock leaving a white trail across its path which is not regular, as the rock has sort of motion effect that deviates it from its predictable trajectory randomly spinning to any size. It has not touch the ground when we see another one, and then another one opening their way through the clouds. Every time closer than the previous one. Producing the same irregular trails across the sky. One of the rocks heavily falls and quick bounces taking some persons with it. The rest of the people panics and run for cover in the yard which is under a second floor of the school. I decide to go with them but I am starting to think that perhaps it is not a good idea to use this building as shelter. Then I hear a crash sound coming from the roof and almost immediately after, a rock makes its way through the roof above us taking more people with it. I hear screams here and there, people running without direction. It is madness all around. I do not have time to see the gore. I take a look out to the field, where I was standing, the number of raining rocks have significantly increased and it is starting to become dense here too. It is chaos, an Armageddon like feeling starts to spread around the place. I decide it is better to go out somewhere I can see the sky in order to avoid any falling rocks. I go out through the main gates of the school which has turned into my primary school because of the rocks have just started to fall in that side. I get to the street and see a lot of people running out of control. I turn to see the sky enough to realize there is one about to fall right where I am, I have to move fast to avoid it with a jump. It falls to my side taking some persons with it/... * Woke up hearing the sound of the wind hardly shaking the leaves of the trees * Relative size of the rocks: