Rules Analysis
Fouls (3.C): It is the responsibility of all players to avoid contact in every way possible.
Avoid contact in every way reasonably possible, while still playing ultimate. Some contact is inevitable, but players have an affirmative obligation to make reasonable efforts to avoid contact.
If non-incidental contact occurs between the thrower and marker such that the thrower could call a throwing foul on the marker, the thrower may instead choose to call "contact." Play does not stop and the marker resumes the stall count at "one." Other than resetting the stall count, the "contact" call is resolved in the same manner as a marking violation (15.B). The marker may contest the "contact" call by calling "violation," which stops play. If the thrower calls "contact" after beginning the throwing motion and subsequently releases the disc, it is treated as if the thrower called "foul."
If non-incidental contact occurs between the thrower and marker such that the thrower could call a throwing foul on the marker, the thrower may instead choose to call "contact." Play does not stop and the marker resumes the stall count at "one." Other than resetting the stall count, the "contact" call is resolved in the same manner as a marking violation (15.B). The marker may contest the "contact" call by calling "violation," which stops play. If the thrower calls "contact" after beginning the throwing motion and subsequently releases the disc, it is treated as if the thrower called "foul."