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Brought back to my school time where there was some fencing that needs to be done as it has not been completed completely, was listening to some instruction on what needs to be done. Then, while in class, there was a whole lot of sand coming down from the top, my thought was it was from the ceiling or building structure, ran outside in order to avoid the building from collapse but realise that the sand was coming out from the sky.

Rans into a shopping mall nearby for cover. The sand was quickly building up, partners up with a person who later strategise to survive this. Trys to gets sources of oxygen, end of dream.