Hello. While traveling in the right lane on the Interstate (I-43) in Milwaukee, Wisconsin, heading southbound with a semi-truck in the center lane, the rear of my vehicle seemed to Lift/Rise off the ground and move (as if the rear of my auto was floating) to the right. I was at the point of being between at the semi-trucks front right tire and his bumper. I was involved in an accident with said semi-truck, thinking he was changing lanes from center lane to right lane and bumped my Left-Rear-Quarter-Panel. After much though and calming down, it seems as if my auto was pushed or lifted in a hydro plane effect by the air between my auto and the semi-truck. The day was clear and dry out around 10:45 AM, on July 15th. 2021. My question is: How many of these Ford Fiesta cars (with manual transmission) have had some type of highway collision with a semi-truck? Or, an unexplained loss (effect) of control while driving on the Interstate. Yes, a rear kind of Hydro-Plane affect with air pressure. Did I really have this happen to me while driving this car, I believe so.