What the hell is "bumper pressure"?
I dunno but anybody who uses the right lane to pass should be burned alive and their ashes put in a rocket and shot into the sun. Clearly you've never been a truck driver.
Nope, never been a truck driver...but I've passed a lot of trucks on the right....if you are going +5 in the left lane, and I'm behind you, and it's clear to me that you've decided to stay in the left lane until you can pass that next vehicle that's going +6 in the right lane, and I can get by you I will. By the time I pass your cab and get back into the left lane I'll be going +10 and you won't even have to slow down.
Bumper pressure is riding close to a vehicle in the left lane to insure that they understand you'd like to get by.