I spotted this whilst bored the other night.
Everyones probably seen it.
But, how on earth is it possible ?
Overweight trailor + the gradient ?
I’d think first trailer was light and second one is (back) heavy and when you couple that configuration to the gradient that kind of behavior might be possible.
With a similar type trailer (B-train), when second trailer is relatively heavy and first trailer has light load you get at least two axle tractor unit easily jackknifed when breaking. That first paragraph is only a guess, but jackknifing isn’t. Empty 20’ container on the first trailer and 40’ container on the second, with a load around 15 tonnes, takes drive axle off the ground when braking if aren’t gentle with your brakes. This happens even at speeds like 35 km/h.
easily done if the fifth wheel is overloaded - used to happen a lot with heavy haulage motors, less now with load sensing valves, fancy suspension etc
That WHEEEEEELY was a good trick 
that was good but not quite as good as timothy dalton in the living daylights doing the wheelie through a fire. And also putting his 18 wheeler on 9 wheels to let the stinger pass underneath. 
The rearmost axle is a tag and is in the raised position. It is only touching the ground because the truck is loaded but it is not carrying any weight. There was photo in T&D’s picture post of a p cab tag axle tractor doing the same trick years ago if anyone can remember it.
could get front wheels 4 foot off ground in 150ton erf.used to make ■■■■■■ police smile. had to be smooth on clutch to come down or one hell of a bang.
gonna try that trick in my old merc, probably just kill it tho i reckon! more power baby!!!
As with the 150ton ERF, the Scania’s torque is taking the easy route by lifting the front of the truck off the ground instead of just turning the back wheels, as has been said, it was a tag with the rear axle raised, the 5th wheel was probably behind the centreline of the drive axle & it was going up a steep incline, the 620 Scania has a lot of torque which helps too.
Good party trick 
The mighty 143! 