Sentence 1: Mike drove down the left lane. 
 Sentence 3: Mike got in the left lane to let the car pass 
 Sentence 4:  The driver in the car passed Mike 
 Sentence 5:  He waved at Mike as he passed 
 Option 1: A car approached him from behind. 
 Option 2: He moved over to avoid a cop car parked on the curb.