Core77

This clip's being doing the rounds but it's too good not to post. Japanese company Kajima demolish skyscrapers one floor at a time, the ground level is jacked-up on massive computer-controlled pillars, cleared out and lowered, the process repeated until the whole building is gone.

The technique is known as 'daruma-otoshi', named after a Japanese game where players have to skillfully knock out the bottom parts of a column without letting the whole thing tumble over. Kajima claims this process reduces the environmental impact of demolition as it's easier to separate materials for recycling and minimizes noise and dust released into the air.

seen here, here & here