Coach on field
 

1/10@A -45. Team A,s head coach comes on the field at B-40 in celebration during A22 run which ends at B-35. What is the down and placement after the pentalty?

This is a non-player foul, enforced from the succeeding spot.

Since the run ended past the line to gain, A is awarded a first down. Enforce 15 yards and set the chains after the penalty enforcement. 1/10 from midfield.