Squall lines typically bow out due to the formation of a mesoscale high pressure system which forms within the stratiform rain area behind the initial line.
In recent years, the pressure has been to divest of investments in companies involved in extracting fossil fuels like oil as a measure against climate change.
The "tire pressure differential" strategy offered the disadvantage that owners and mechanics could inadvertently but easily re-introduce oversteer characteristics by over-inflating the front tires.
Further along the exhaust pipe, the exhaust pressure wave encounters a converging conical section, and this reflects a "positive" pressure wave back up the pipe.
