Requesting a re-throw. The player must let the disc hit the ground. This is where it gets weird. I think that there is a problem in this case. Here are the rules.
Fouls are the result of physical contact between opposing players.
The player initiating contact is guilty of a foul. A. A throwing foul may be called when there is contact between the thrower and the marker. When a foul is committed by a thrower or the marker, play stops and possession reverts back to the thrower after a check. If the thrower is fouled in the act of throwing and the pass is completed, the foul is automatically declined and play continues without interruption. If the marker is fouled in the act of throwing and the pass is not completed, play continues without interruption.