Although it would be amusing for them to do it at high velocity if the cars (and surrounding cars if any) were "dead heading" or had no humans in them for other reasons (perhaps because the humans had fled the vehicles upon seeing the fire truck headed their way!).
Although it would be amusing for them to do it at high velocity if the cars (and surrounding cars if any) were "dead heading" or had no humans in them for other reasons (perhaps because the humans had fled the vehicles upon seeing the fire truck headed their way!).