If it is one mile in each direction you cannot average 60 mph because it took you 2 minutes to get there and there is no time left to average 60 mph.
Keep going!
If it is two miles distance, then it took you 4 minutes to arrive. This also leaves you no time for the return trip.
Of course, this all assumes the same path for the return trip.
You’re the winner. It actually works for any distance.