They knew the boss.
Students ate pies,then they threw the plate to the boss and the boss caught it skillfully.
They thought this was fully, so they invented frisbee
They knew boss the students eats the meat pie in this, then finished eating the meat pie to result in tray skilled throwing for boss, boss has been also skilled meets, they thought is like this very amusing, therefore invented flew the plate
They understand the boss
The students in this pie to eat, then eat a pie plate skilled throw the boss, the boss is also a skilled caught, they feel that this is a lot of fun, so they invented the Frisbee