What do you say to the coach?

[GrizzlyUmp14]

Pre-season high school scrimmage last week. I'm at the plate and there is a ground ball to the shortstop. There's a play at first, but F3 drops the ball, so the runner is safe. The coach asks my partner - "Would he have been safe or out if he had caught the ball?" I don't think my partner heard him, so he didn't answer. What would you say? The ball was clearly there before the runner, so if you say he is out, the coach says - "My player had possession." If you say he was safe, the coach has a right to complain. It seems that he's trying to bait us into saying something stupid. What do you do?