Never tire of seeing things crash in slomo.
I can't see what happened to the engine though, crazy.
Now that you mention it, I don't see an engine either. It's being towed with a cable.
They are testing the barrier to see if it can withstand a truck like that going about 50mph to stop would-be bomb trucks.
Much worse will be a standard passenger vehicle. The barrier should neatly decapitate them and remove the car roof while the car continues relatively un-slowed