Amazing excavators at work, trucks-dumpers,wheel loaders, bulldozers in action,heavy transportations, cat - caterpillar, Komatsu, Liebherr, Volvo,hitachi,crushers and attachments working and digging in mud and mines for coal and quarries.Operator Skill excavator fail, bulldozer fails, top idiots, dump truck, machinery, channel, heavy, equipment, operator, skill, amazing, modern, construction