Fly after pitch bounces in front of plate

[strike4]

I got it right!!!

Coach wanted to argue that you can not get a fly out since the ball hit the ground. His arguement was since a pitched ball hitting the ground before the batter swings on 3rd strike is considered a D3K then this should be ruled a grounder. When the game was over, he still thought I made the wrong call.

Thanks for you input.