Don't Brake Check a Semi
Semis are big vehicles. Given they have to haul enormous ammount of freight, semis have moving power that can be difficult to stop at a moments notice, so you would be smart to stear clear of their path if you find yourself near them on the freeway.
This driver, however, was "fortunate" enough to have the finger shown to him by the driver of that van, just before he tries to "break check" the semi. If you ignore the rudeness, all you are left to judge upon is the guy's reasoning.
What was he thinking? The finger was retrieved just before the semi's momentum nudged the driver into some sense and he slammed the gas pedal! Thank goodness for that dash cam.
This here is natural selection at it's finest!