One pickup driver in Thailand recently got a lesson in why you don't block the fast lane for multi-axle truckers, ever, ever.
The trucker ended up running the pickup right off the road, as you can see in this video from Man Prawat Thaisawat's Facebook page. Skip to about 2:00 in to where the action starts.
The moral of the story is that the fast lane (which is on the right in Thailand because they drive on the wrong side of the road) is for passing, particularly when a completely reckless, bloodthirsty trucker is in your rearview.
This Is Why You Don't Block A Truck In The Fast Lane