LBJ would prank guests at his ranch by driving his car into the lake.

LBJ would prank guests at his ranch by driving his car into the lake.

Not many people were lucky enough to own an Amphicar, the only mass-produced civilian amphibious vehicle, but at least one of them put theirs to good use. Lyndon B. Johnson, the 36th president of the United States, used his Lagoon Blue model to prank unsuspecting guests at his ranch in Stonewall, Texas, by driving it into the lake without warning. On land, the Amphicar looked like any other car; once in the water, propellers turned it into a boa…