There's a good chance that they pour oil on the left lane(way before the corner). It could be the wooden block as you claimed, but I couldn't see it in the picture you've posted. The original intention was to make victim skid, hit their both front/rear left wheel on the road shoulder and total their tyres and rims so these call man/tow truck service can tow their car back. That however, they wasn't expect the car that came so fast(which is you doing 100+) and became a lift-off oversteer and turtle a Focus(more like a MyBi thing).

*Here refer the 3rd party towing service/call man as THEY/THEIR/THEM: They usually setup the trap after 2am, that's their morale to NOT involve more than 2 cars in an accident, so to avoid fuzz came and do their usual scene inspection(and ofcourse if found oil on the floor, fuzz will smile at the tow truck and ask them whether need to make the report straight or change a little bit(that ofcourse will eat into their profit). They usually setup the trap as far as 100 meters away from their targeted area(trust me, oil on rubber can reduce frictional surface for a very long time). They like to hide under fly over/elevated way/under bridge and wait for their prey to fall into their trap, because usually those place got rest area for motorcyclist during bad weather. They don't work alone, usually in pair or trice but not more than that. Reason being, if more than 1 car accident, 2 of them will be able to do their job. The extras usually will act as a dumbass overcharge fella that call for crazy pricing, so the victim will fall for the already tripled of reasonable price' price. But ofcourse the dumbass overcharge fella will still get his cut later after being settled

Now you have the minimal knowledge to reconstruct the conspiracy. What time the event taken place? Think back, what happened when you exited Kesas, what happened? Before enter the tunnel, why did you choose the left lane? Other than the fast car infront of yours, is there something blocking the right lane that makes you feel uncomfortable hence you chosen the left? After the accident, they came within 10 seconds. Which direction from the end of the tunnel? Where about they came from? The direction they came from got what?

Angry? Felt being setup? Not necessarily, next time drive slower & take cautious.