Several pupils were injured when the human structure suddenly collapsed as horrified classmates watched
A human pyramid came crashing to the ground under the weight of 150 school students as their classmates watched in horror.
The terrifying incident - which left six injured - was caught on camera and showed the very last student climbing to the top of the human structure .
But as he attempts to steady himself before making the final manoeuvre, the pyramid starts to wobble dangerously.
Seconds later, all 150 pupils collapsed to the ground as fellow classmates scream loudly.
The incident occurred at a high school in Yao City, Japan on September 30.
One student fractured an arm and five others suffered injuries according to Japanese media reports.
Despite the obvious dangers, human pyramids are still practised regularly in Japan as part of gymnastic classes.