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.

Next time drop the trailer on ground when you do that, so you don't have all that twisting and bending of trailer and fifth wheel.