the person is moving through the air while the other people are either not moving forward or backwards or on the ground with full controll over where they go
As we know that in projectile motion one of the component of the motion of object will remains constant while other component which is vertical in direction will change due to gravity.
So here in this type of motion the path of the object is same as the parabolic path.
Here we know that vertical component of the motion will change due to gravity while horizontal component will remain constant always
