https://au.news.yahoo.com/a/30218959/mysterious-footage-of-cars-flying-in-china/
Chinese media have offered up an explanation reporting that the incident was caused by a piece of steel cable, which was caught up in the brush of a street sweeper.
You can tear a car in half with a steel cable, they are massively strong. Lifting cars in the air is no bother.How could a steel cable in a street sweeper lift two vans?
http://v.163.com/zixun/V8GAM8GTF/VB8IU87AG.html
Chinglish translation:
Street cleaner make cable twist and pull car in air much high