A group of people are in a special formation on a soccer field.
The group of people are flying in the air on their unicorns.
because a soccer field is on the ground, and the ground is not in the air, then the people on the soccer field cannot be flying in the air on unicorns
Unicorns don't exist and the people can't be on a soccer field if they are flying in the air.
People on a soccer field would not be flying on their unicorns.