[Cd]

For years now I have read about you guys feeling the vacuum as a truck drives past you in the next lane.
I drive a '93 Civic hatch and have even had semi trucks pulling mobile homes, large busses, etc, and have never once encountered this phenomenon.

However, I just recently encountered what you guys are talking about on a trip to see my parents in Houston.
Speeds were 70-75 mph ( I'm just under that at 65-70 ) and a truck drives by me doing maybe 80-85.
As he goes by, I feel a sudden 'pop' in the air and heard myself saying out loud "whoa ! "

Here is what puzzles me - the truck was a 2012-2015 Ford F-150 lifted perhaps 6" with a grille bar on the front.

Why would I feel the phenomenon from a much smaller vehicle like this versus a semi ? Right place, right time, or is this something you guys encounter quite often ?