Ram is standing behind Gaurav and at the same time Gaurav is standing behind Ram. How is this possible?

Question

Two people are traveling across the country. They both leave from the same city, and both have the same final destination. They also both leave at the exact same day and time. One travels by bus, and the other by aircraft. However, the bus passenger arrives before the passenger on the aircraft.
How is this possible?

Answer 1

they are standing with their faces in different directions. Their backs are facing each other.

Answer 2

When both of them turns 90 degree.. simultaneously they become back to back.