Thank you for the replies. I am not really sure what caused the Pop. I almost think that in normal training if he cheats he gets corrected. he knew he was cheating and I was treating this like a mock test so there was no correction. I think that me allowing him to cheat and work it out on his own confused him. I may be over thinking that, but When I said fetch it up he went straight to it and knew where it was with no guidence. This was a new training place and the marks were cold earlier in the day. He nailed it twice already. the bumper did land right in a sun glare this time maybe that caused it. Also, this was the first time practicing walk up on water (but again he already did it twice that day). I may have just done it one too many times. Normally, I run him twice and put him up, but it was no nice out and the first time in a while we got in the water so I figured one more time won't hurt if we are both having fun. I am not so much concerned with what caused the pop because at this point it is not an ongoing problem. He just made a mistake in my eyes, and I can not control that. I am worried about how I handle the situation.
Here is what I gather from the replies.
In a test do not yell "NO" ever
In a test give the dog some time to try and work it out on his own and if it is clear he will not, handle him to the mark.
In training what I did was fine, I may want to consider calling him back as an alternative as long as I end with success.
I am trying to get a better feel for a test situation. Are all verbal commands out? so just a verbal "fetch it up" is just as bad as yelling no? can I talk to the dog? can I praise the dog? He is very used to Praise and encouragement from me, do I need to cut that out getting ready for test?
Let's say I already used my handle, could I have said his name again?