This was about an 80 yard send to a passive decoy and the decoy went down.

LOL...

I presume that trainer went down.

His right foot is already partially up in the air and the angle of his body is totally off of a balanced center position.

With a 100+# push, he should have tumbled over backwards easily.

Nice picture by the way. Looks like he bit into the left arm too.

FWIW

Again, left foot totally off the ground and whole body is in a forward freefall. 

Really good picture of the decoy going down, but not much of a picture of your dog!

FWIW

In PSA, a dog can be a leg dog or upper body dog and you have to tell the judge which one the dog is before you trial.  Geist is an upper body dog and 99% of the time, his target will be the left bicep.  Exceptions are flee attacks where he will bite the tricep or back, and there is a fend off scenario where the dog blocks the dog from biting the upper body with various objects and the dog has to bite the leg.

Decoy, not dog, blocks dog.

Yes, your odds are good with that much training. You are already well on turn way to passing level 2.

How old is he?

The trainer is Chip. The person who catches the bite is called a Decoy.

In PSA your dog can pick the body area to attack?

Look at those teeth. Fierce.