I guess the force wasn’t strong enough for Vader that night. 
Almost felt a little sorry for the guy with his mask on the ground.
Don’t mess with the FHP (Florida Highway Patrol) they’ll take on anybody. 
So Vader was told; “Look, you can go no farther.” 
The Force was strong to that one.
From the linked article:
“After the suspect suddenly lied down in the roadway”
IANAGN, but one expects more from journalists.
