You are driving in a car at a constant speed. On  your left side is a
valley and on your right side is a fire engine  traveling at the same
speed as you. 
In front of you is a galloping pig which  is the same size as your car
and you cannot overtake it.  Behind you is a helicopter flying at ground
level. Both the giant pig  and the helicopter are also traveling at the
same speed as  you. 
What must you do to safely get out of  this highly dangerous situation?