bridgestone used to make a motorcycle that had a rotory shift down, all gears shifted down 1-5th then up to down shift with neutral between 1st and 5th, however when going through the gears and get into fifth and hit it again thinking you have another gear you would bypass neutral and go directly to 1st damaging the transmission or causing an accident by skidding (especially in a turn). Thats why 1 down and 4 up with neutral in between 1st and second makes more sense and less dangerous.
