Answer:
Lyndon B. Johnson's Sinking Convertible
Step-by-step explanation:
Privileged guests of Lyndon B. Johnson would be spoiled with trips to his Stonewall ranch in Texas. Johnson would often take his visitors on joyrides through the winding roads in his lagoon blue convertible. What started out as a pleasant top-down drive would take a horrific turn when Johnson would start shouting that his breaks had malfunctioned and that they were headed straight for the river. While his passengers broke out in panic, Johnson would erupt in laughter as the convertible began to float on the water's surface. Johnson's ride was in fact was an Amphicar, a German manufactured land-to-water vehicle released in the early 1960s with limited success. While Amphicars' production ended in 1967, the car lives on as a character in one of the best presidential pranks.