This is a mountain collapse video from Guiyang, Guizhou, which blocked a section of highway in the southwestern Chinese last Monday.
Luckily, the large rockfall happened only minutes after highway officials had stopped traffic from.
The landslide wrecks havoc on a road below, almost crushing a car. The live Youtube video below includes a nice set of images of the aftermath. The mountain collapses at the 0:03:
According to the Landslide Blog:
[quote_box_center] The collapse event appears to have happened on a pre-existing basal release surface and to be defined by a set of existing vertical joints – i.e. in essence this is a complex wedge failure, as this screenshot shows:
This collapse is the result of a failure to properly assess the discontinuities in the rock mass during construction. Such events should be avoidable with proper engineering geological assessment and mitigation. [/quote_box_center]
Freaky natural disaster! But this one could had been prevented. This is not the case for 6 workers that died trying to drain one of the valley-blocking landslides after the August 2014 Yunnan Quake.